Lista completa de APIs WEB 2.0

A través de una pagina me encuentre con un completo listado de APIs Web 2.0
si les pasa como a mi que nunca las encuentran aca estan casi todas.
Espero que les sirva a uds y a mi para ser NFU ja



Advertising

http://code.google.com/apis/adsense
Google AdSenseAdministración de publicidad con Adsense

http://www.google.com/apis/adwords/
Google AdWords - Anunciarse en buscador Google

http://msdn2.microsoft.com/en-us/library/aa983013.aspx
Microsoft adCenter - Servicios de publicidad online de Microsoft

http://www.urltrends.com/apidocs/
UrlTrends - Optimización de búsqueda y seguimiento de enlaces

http://www.wordtracker.com/docs/api/
Wordtracker
Search engine optimization services
http://searchmarketing.yahoo.com/af/yws.php
Yahoo Ads
Administración de anuncios online de Yahoo
http://searchmarketing.yahoo.com/api/
Yahoo Search Marketing
Plataforma de publicidad en búsquedas

http://www.answerbag.com/docs/xmlschema/
Answerbag
Questions and answers service
http://www.blogwise.com/api/
Blogwise
Blog and feed search service
http://splogspot.com/pages/api_help
SplogSpot
Database of spam blogs

Blog Search

http://www.blogwise.com/api/
Blogwise
Servicio de búsqueda en blogs y feeds
http://splogspot.com/pages/api_help
SplogSpot
Base de datos de blogs de spam

http://tailrank.com/api
Tailrank
Blog search and news aggregation service

http://technorati.com/developers/
Technorati
Servicio de búsqueda en blogs
Blogging

http://akismet.com/development/api/
Akismet
Servicio de prevención de spam en blogs

http://code.google.com/apis/gdata/blogger.html
Blogger
Servicios para Bloggear

http://feedblitz.blogspot.com/2006/10/feedblitz-api.html
FeedBlitz
Servicio de email para blogs

http://www.feedburner.com/fb/a/developers
FeedBurner
Blog promotion tracking service

http://www.livejournal.com/developer/
LiveJournal
Blogging software
http://performancing.com/metrics/handbook/api
Performancing
Blog management

http://www.sixapart.com/pronet/docs/typepad_atom_api
TypePad
Blog management
http://weblogs.com/api.html
Weblogs
Blog ping service
http://dev.live.com/spaces/
Windows Live Spaces
Servicios Blogs
Bookmarks
http://dev.blogmarks.net/wiki/DeveloperDocs
Blogmarks
Social bookmarking
http://del.icio.us/doc/api
del.icio.us
Social bookmarking

http://www.linkagogo.com/rest_api.html
linkaGoGo
Social bookmarking service
http://ma.gnolia.com/support/api
Ma.gnolia
Social bookmarking service
http://www.onlywire.com/index?api
OnlyWire
Social bookmarklet service

http://www.shadows.com/features/site/help/api.htm
Shadows
Social bookmarking and community

http://www.simpy.com/doc/api/rest
Simpy
Social bookmarking

Calendar
http://30boxes.com/api/
30 Boxes
Servicio de Calendario
http://code.google.com/apis/gdata/calendar.html
Google Calendar
Servicio de Calendario
http://spongecell.com/api_info
Spongecell
Servicio de Calendario online

Chat
http://developer.aim.com/plugin
AOL Instant Messenger
Servicio de mensajería instantánea

http://developer.aim.com/presenceMain.jsp
AOL Presence
Online presence service

http://www.google.com/talk/developer.html
Google Talk
Aplicación de Chat
http://www.imified.com/api/
IMified
Instant messenger buddy

http://wiki.lingr.com/dev/
Lingr
Online chatroom services

http://dev.live.com/messenger/
MSN Messenger

Chat y mensajería

http://developer.aim.com/webaim/
WebAIM
Web based instant messaging

http://developer.yahoo.com/messenger/
Yahoo Messenger
Mensajería instantánea

Community
http://bluedot.us/Developers.aspx

Blue Dot
Content sharing community
http://www.corank.com/api.html
coRank
Distributed user reviews service

http://developers.facebook.com/
Facebook
Social networking service

http://www.strikeiron.com/ProductDetail.aspx?p=240
PartySpark
Social events service

http://www.rockyou.com/corp/facebook/dev.php
RockYou Super Wall
Content sharing platform within Facebook

http://twitter.com/help/api
Twitter
Community site

Email

http://www.strikeiron.com/ProductDetail.aspx?p=167
Email Address Validator
Email address validation service

http://developer.exacttarget.com/
ExactTarget
Email delivery services
http://app.intellicontact.com/icp/pub/api/doc/api.html
IntelliContact
Email marketing service

http://www.jangomail.com/database_api.asp
JangoMail
Bulk email service

http://www.mailbuild.com/api/
Mailbuild
Email forms and templates service

http://www.blueskyfactory.com/blog/2007/07/did-you-know-that-publicaster-offers.html
Publicaster
Email marketing management

http://www.strikeiron.com/ProductDetail.aspx?p=179
StrikeIron Email Verification
Email verification service

http://www.verticalresponse.com/labs/developers/
Vertical Response
Email management services

http://www.webmail.us/resellers/api
Webmail.us
Email hosting service

http://www.whatcounts.com/technology/apis.html
WhatCounts
Email management services

http://developer.yahoo.com/mail/
Yahoo Mail
Web based email system


Enterprise


http://developer.employease.com/extend.html
Employease
On-demand human resource management

http://code.google.com/apis/apps/gdata_provisioning_api_v2.0_reference.html
Google Provisioning
User provisioning for Google Applications
http://www.lokad.com/Support.ashx
Lokad
Time series forecaster
http://www.netdocuments.com/Alliances.aspx
NetDocuments
Enterprise document management service

http://www.netsuite.com/portal/developers/main.shtml
NetSuite
Business application suite
http://www.sforce.com/
Salesforce.com
CRM services
http://www.webex.com/partners/developer-overview.html
WebEx
Conferencing and collaboration services

Events
http://www.eventfinder.co.nz/content/api.html
Eventfinder
Calendario de Eventos
http://api.eventful.com/
Eventful
Events discovery and demand

http://www.spraci.com/api/
Spraci
Events and clubs database
http://upcoming.yahoo.com/services/api/
Upcoming.org
Collaborative event calendar
http://www.zvents.com/support/developers
Zvents
Local events search and community

Financial
http://www.blinksale.com/api
Blinksale
Online invoicing services
http://www.strikeiron.com/ProductDetail.aspx?p=227
Currency Rates
Ratios de conversión entre monedas

http://www.strikeiron.com/ProductDetail.aspx?p=223
Dun and Bradstreet Credit Check
Credit check
http://developers.freshbooks.com/
FreshBooks
Online invoicing and time tracking
http://api.kashflow.co.uk/
KashFlow
Online accounting software

http://www.moneytrackin.com/help/API/
Moneytrackin
Expense tracking
http://www.netaccounts.com.au/developers/
NetAccounts
Online accounting service
http://www.prosper.com/tools/API.aspx
Prosper
Peer-to-peer network

http://www.strikeiron.com/ProductDetail.aspx?p=113
StrikeIron Historical Stock Quotes
Stock price quotes for US equities
http://www.strikeiron.com/ProductDetail.aspx?p=124
StrikeIron Mutual Funds
Historical mutual funds
http://www.strikeiron.com/ProductDetail.aspx?p=115
StrikeIron Stock Quotes Basic
Real-time stock quotes

https://www.wesabe.com/page/api
Wesabe
Personal finance management and community
Government
http://www.avencia.com/Products/Cicero/Developers.aspx
Cicero
Lookup service for US elected officials by address

http://www.civicfootprint.org/about/api
Civic Footprint
Political geography lookup for Illinois
http://support.democracyinaction.org/wiki/index.php/API_Documentation
Democracy In Action
Advocacy services for nonprofits
http://www.fedspending.org/apidoc.php
FedSpending.org
Database of US government spending

http://www.followthemoney.org/services
Follow The Money
Database of US campaign contributions
http://www.state.ri.us/govtracker/services/
GovTracker
Rhode Island state data services
http://www.louisdb.org/api/
LOUIS
US federal documents database

http://ops.espacenet.com/
Open Patent Services
European Patent Office web services
http://sunlightlabs.com/api/
Sunlight Labs
US Congress database service
http://www.theyworkforyou.com/api/
TheyWorkForYou
Track the UK Parliament

http://whoismyrepresentative.com/
Who is my Representative
Database of US congressional representatives
Internet
http://aws.amazon.com/ast
Alexa Site Thumbnail
Thumbnail images of web site home pages

http://aws.amazon.com/alexatopsites
Alexa Top Sites
Web site traffic rankings
http://www.amazon.com/b/ref=sc_fe_l_2/104-7185354-2899168?ie=UTF8&node=201590011&no=3435361
Amazon EC2
Elastic Compute Cloud virtual hosting
http://getclicky.com/help/api
Clicky
Servicio de estadísticas para <a title=sitios web http://carrero.es/categoria/sitios-web>sitios web

http://developer.compete.com/
Compete
Internet web site metrics and analytics
http://cordurl.com/static/api.html
Cordurl
Geo coordinate translation
http://www.dapper.net/developers/webservices/search.php
Dapper
Service for API creation

http://xml-api.domaintools.com/
Domain Tools
Internet domain name lookup
http://durl.us/
Durl.us
URL shortening
http://www.ecommstats.com/services/docs/
Ecommstats
Web analytics

http://www.hostip.info/use.html
Hostip.info
IP lookup
http://www.html2pdf.biz/api.php
HTML2PDF
HTML to PDF conversion
http://www.archive.org/help/contrib-advanced.php
Internet Archive
Non-profit Internet library

http://www.strikeiron.com/ProductDetail.aspx?p=149
IP Address Lookup
Determine IP address from domain name
http://www.shauninman.com/plete/2005/10/mint-intro-to-pepper-development
Mint
Web site metrics and reporting
http://mon.itor.us/api/api.htm
Mon.itor.us
Web site monitoring services

http://mynotify.com/info/developers
MyNotify
Feed publication
http://www.nenest.com/_doc/Api.aspx
Nenest
Web forms and application framework
http://www.outune.com/?ln=mc
Outune
Web map engine

http://www.pingdom.com/api/
Pingdom
Web site monitoring and reporting
http://qurl.com/help_automate.php
Qurl
Redirección de URL
http://www.softlayer.com/devnet.html
SoftLayer
Systems management and monitoring

http://unapi.info/
UnAPI
Proposal for web clipboard
http://www.w3counter.com/features/api/
W3Counter
Web site metrics tools
http://webride.org/developers/api
Webride
Attaches discussions to any site

http://bluga.net/webthumb/api.txt
WebThumb
Thumbnail image generation
http://msdn2.microsoft.com/en-us/library/bb259721.aspx
Windows Live Custom Domains
Web site administration
http://developer.yahoo.com/search/siteexplorer/
Yahoo Site Explorer
Web site analysis service

Job Search
http://www.indeed.com/jsp/apiinfo.jsp
Indeed
Job search services
http://services.smashfly.com/simplepostservice/postingmanager.asmx
SmashFly
Job board posting service

Mapping
http://www.esri.com/software/arcwebservices/index.html
ArcWeb
Mapping and GIS services
http://www.bigtribe.com/publisher/docs/references.jsp
BigTribe
Location based advertising

http://www.telcontar.com/products/dds/dds_webservicesapi.html
deCarta
Location-based services
http://www.earthtools.org/webservices.htm
EarthTools
Web services for geographical information
http://www.feedmap.net/BlogMap/Services/
FeedMap
Blog geo-coding

http://developer.garmin.com/web-products/web-services/
Garmin MotionBased
GPS services and mapping
http://geocoder.us/help/
geocoder
Geocoding services for US
http://geocoder.ca/?api=1
geocoder.ca
Geocoding services for Canada

http://www.geoiq.com/
GeoIQ
Geospatial analysis and heat mapping service
http://www.geonames.org/export/
GeoNames
Geographic name and postal code lookup
https://www2.getmapping.com/webemail/mobileapps.aspx
GetMapping
Aerial photography and mapping service

http://www.globexplorer.com/products/imagebuilder-suite.shtml
GlobeXplorer
Mapping services
http://www.google.com/apis/maps/
Google Maps
Mapping services
http://www.hopstop.com/freeapi/
HopStop
Mass transit and walking directions

http://www.isharemaps.com/products/isharemaps_on_demand/isharemaps_on_demand.html
iShareMaps On Demand
UK Postcode Geocoder
http://devnet.map24.com/index.php
Map24 AJAX API
Mapping services
http://www.mappr.com/about/api.phtml
Mappr
Photo mapping

http://www.mapquest.com/features/main.adp?page=developer_tools_oapi
MapQuest
Online mapping service
http://www.mapstraction.com/
Mapstraction
Mapping API abstraction layer
http://labs.metacarta.com/GeoParser/documentation.html
MetaCarta
Location and geotagging services

http://msdn.microsoft.com/mappoint/
Microsoft MapPoint
Mapping services
http://dev.live.com/virtualearth
Microsoft Virtual Earth
Mapping services
http://www.multimap.com/share/documentation/api/
Multimap
Global online mapping service

http://wms.jpl.nasa.gov/
NASA
Satellite mapping images
http://openapi.naver.com/19.html
Naver Maps
Korean mapping service
http://www.nearby.org.uk/api/convert-help.php
Nearby.org.uk
Geocoding service for UK

http://www.ontok.com/geocode/jsapi
Ontok
Geocode any US address
http://www.openlayers.org/
OpenLayers
Mapping API abstraction layer
http://wiki.openstreetmap.org/index.php/OSM_Protocol_Stack
OpenStreetMap
The Free Wiki World Map

http://www.platial.com/services/api
Platial
Collaborative geographic service
http://www.codeplaze.com/
Plazes
Location discovery service
http://freeearth.poly9.com/api/documentation.php
Poly9 FreeEarth
3D mapping service

http://www.pushpin.com/
Pushpin
Mapping service
http://ws.urbanmapping.com/hoods/docs
Urban Mapping
Urban geo-spatial data services
http://gisdata.usgs.gov/XMLWebServices/TNM_Elevation_Service.php
USGS Elevation Query Service
Determine elevation based on latitude and longitude

http://dev.viamichelin.com/
ViaMichelin
Mapping, directions, and travel booking
http://www.wayfaring.com/help/published/Wayfaring+API
Wayfaring
Map creation and sharing service
http://www.where.com/create/
WHERE GPS
Mobile GPS widget platform

http://www.timhibbard.com/webservices/engraphgps/engraph.asmx
Where Is Tim Web Service
Location tracking
http://www.where2getit.com/landing/developers
Where2GetIt Geospatial
Non-mapping geospatial services
http://www.where2getit.com/landing/developers
Where2GetIt SlippyMap
Online mapping service

http://workshop.whereis.com/api/index.thtml
Whereis
Australian and New Zealand mapping service
http://wigle.net/wiki/index.cgi?API
Wigle
Wireless network mapping
http://developer.yahoo.net/maps/rest/V1/geocode.html
Yahoo Geocoding
Geocoding services

http://developer.yahoo.com/maps/rest/V1/mapImage.html
Yahoo Map Image
Map image creation service
http://developer.yahoo.com/maps/
Yahoo Maps
Mapping services
http://www.zeesource.net/maps/geocoding.do
ZeeMaps
Embedded maps and international geocoding

http://developer.zoomin.com.au/
ZoomIn
Australian mapping service
Media Management
http://www0.rdthdo.bbc.co.uk/services/
BBC
Multimedia archive database

http://grouper.com/api/
Grouper Video
Video sharing service
http://developer.orb.com/
Orb
Digital media remote access and management
http://support.phanfare.com/doc/Phanfare_Public_API
Phanfare
Photo and video sharing service

http://mediamax.streamload.com/webservices/
Streamload
Online media storage
Medical
http://www.ncbi.nlm.nih.gov/entrez/query/static/esoap_help.html
cPath
Medical database lookup

http://www.genome.jp/kegg/soap/
Kegg
Bioinformatics data services
http://www.ncbi.nlm.nih.gov/entrez/query/static/esoap_help.html
NCBI Entrez
Life sciences search services
http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pubmed&amp;pubmedid=12401134
SeqHound
Bioinformatics research database

Messaging
http://www.411sync.com/cgi-bin/developer.cgi
411Sync
SMS, WAP, and email messaging
http://www.aql.com/site/developerinfo.php
Aql
SMS solutions portal

http://www.clickatell.com/brochure/products/api_http.php
Clickatell
SMS Messaging services
http://jaiku.com/api
Jaiku
Social messaging service
http://www.mobivity.com/developers.aspx
Mobivity
SMS marketing messaging service

http://www.movil.be/?s=developer_zone
Movil
SMS messaging
http://group.partysync.com/cgi-bin/developer.cgi
PartySync
Messaging services
http://www.sabifoo.com/help
Sabifoo
IM to RSS conversion service

http://www.smsbug.com/api/webservice.asmx
SmsBug
SMS messaging services
http://strikeiron.com/ProductDetail.aspx?p=190
StrikeIron Global SMS Pro
SMS messaging services
http://www.strikeiron.com/ProductDetail.aspx?p=162
StrikeIron Mobile Email
Mobile email messaging service

http://textamerica.com/api.aspx
Textamerica
Moblogs
http://w2.trekmail.com/stories/storyReader$46
Trekmail
Messaging services
http://api.twittervision.com/api.html
Twittervision
Location based data for the <a title=Twitter http://carrero.es/twitter/367>Twitter service

http://dev.aol.com/userplane/index.html
Userplane
Communication software for online communities
https://www.vazu.com/api/index.php
Vazu
SMS messaging service
Music

http://aol.musicnow.com/media/developer/index.htm
AOL Music Now
Music playlist management
http://digitalpodcast.com/podcastsearchservice/
Digital Podcast
Podcast search
http://www.faces.com/Edit/API/GettingStarted.aspx
Faces.com
Photo and media sharing service
http://www.feedcache.net/index.php?n=Main.API
Feedcache
Feed caching service
http://www.freedb.org/modules.php?name=Sections&amp;sop=listarticles&amp;secid=2
Freedb / CDDB
Online CD catalog service
http://www.audioscrobbler.net/data/webservices/
Last.fm
Music playlist management

http://www.mp3tunes.com/api/
MP3Tunes
Music services
http://wiki.musicbrainz.org/XMLWebService
MusicBrainz
Music metadata community service
http://www.musicip.com/dns/
MusicDNS.org
Music fingerprinting service

http://mobdev.pbwiki.com/
MusicMobs
Social music service
http://www.musicstrands.com/openstrands/overview.vm
OpenStrands
Music recommendation and discovery
http://webservices.rhapsody.com/
Rhapsody
Online music services
http://www.seeqpod.com/api/
SeeqPod
Music recommendation service
http://labs.snocap.com/software/mystore-search-api/
SNOCAP
Digital music marketplace
http://soundtoys.net/contribute/api
Soundtoys
Visual artists works repository

http://tunelog.com/api/
Tunelog
Music metadata management
http://webjay.org/api/help
WebJay
Music playlist management
http://dev.aol.com/winamp/index.html
Winamp
Customizable music player

http://developer.yahoo.com/music/
Yahoo Music Engine
Desktop music player
News
http://amphetarate.newsfairy.com/api.php
AmphetaRate
News aggregator
http://sws.clearforest.com/Blog/?page_id=6
ClearForest Semantic Web Services1
Natural language processing tools
http://developer.daylife.com/
Daylife
Online News Service
http://apidoc.digg.com/
Digg
http://www.findory.com/help/api
Findory
Personalized news aggregation
http://weblogs.macromedia.com/mxna/Developers.cfm
Macromedia News Aggregator
Data access service
http://w.moreover.com/site/products/oem/search_api_oem.html
Moreover
News delivery

http://www.newscloud.com/learn/apidocs/
NewsCloud
Social news service
http://www.newsisfree.com/webservice.php
NewsIsFree
Online news aggregation
Office

http://www.backpackit.com/api/
Backpack
Online information manager
http://wiki.bigcontacts.com/index.php/API_Details
Big Contacts
Web based contact management
http://labs.editgrid.com/wiki/EditGrid_API
EditGrid
Online spreadsheet

http://code.google.com/apis/documents/overview.html
Google Documents List
Document management services
http://code.google.com/apis/gdata/spreadsheets.html
Google Spreadsheets
Online spreadsheets
http://numbler.com/apidoc
Numbler
Online spreadsheet service

http://www.slideshare.net/developers/
SlideShare
Presentation sharing community
http://***/public/help/zohoapi/fullpage
Zoho
Online office suite
Photos

http://dev.aol.com/aol_pictures
AOL Pictures
Online photo management
http://www.buzznet.com/developers/
Buzznet
Photo sharing
http://techmagazine.ws/full-web-20-api-list/www.flickr.com/services/api/
Flickr
Photo sharing service

http://www.fotolia.com/Services/API/Introduction
Fotolia
Royalty free stock photos
http://code.google.com/apis/picasaweb/overview.html
Google Picasa
Photo management and sharing service
http://www.imageloop.com/de/api/index.htm
imageLoop
Animated slideshow service
http://techmagazine.ws/full-web-20-api-list/www.panoramio.com/api/
Panoramio
Photo upload site with organizer

http://www.pixagogo.com/Tools/api/apihelp.aspx
Pixagogo
Online photo services
http://techmagazine.ws/full-web-20-api-list/www.riya.com/riyaAPI
Riya
Photo search

http://techmagazine.ws/full-web-20-api-list/www.shutterpoint.com/Home-API.cfm
ShutterPoint
Stock photography service
http://blogs.smugmug.com/api/category/smugmug/smugmug-api/
Smugmug
Photo sharing service
http://techmagazine.ws/full-web-20-api-list/snipshot.com/services/
Snipshot
Online photo editing service

http://techmagazine.ws/full-web-20-api-list/www.webshots.com/html/services.html
WebShots
Photo sharing service
http://techmagazine.ws/full-web-20-api-list/developer.yahoo.com/photos/
Yahoo Photos
Online photo service
http://***/public/help/zohoapi/fullpage
Zoto
Photo sharing service

Recommendations
http://blog.criteo.com/tag/API
Criteo
Distributed recommendation service
http://easyutil.com/rec_api_ref.html
EasyUtil
Recommendation service
http://www.rapleaf.com/apidoc/v1
RapLeaf
Portable ratings system
http://www.yelp.com/developers/documentation
Yelp
Local user reviews and city guides
Reference

http://services.aonaware.com/DictService/
Aonaware Dictionary
Dictionary lookup service/td&gt;
http://www.strikeiron.com/ProductDetail.aspx?p=240
City and State by Zip Code
Address lookup service
http://www.strikeiron.com/ProductDetail.aspx?p=207
Dun and Bradstreet
Research company background data

http://techmagazine.ws/full-web-20-api-list/www.chilternplc.com/services/area/11/svc/201%20-%2019k
Bussines Verification
Business research services
http://api.futef.com/apidocs.html
FUTEF Wikipedia API
Third party Wikipedia web service
http://search.cpan.org/%7Erjray/WebService-ISBNDB-0.32/lib/WebService/ISBNDB/API.pm
ISBNdb
Books database

http://www.loc.gov/standards/sru/
Library of Congress SRW
Information database search
http://services.msdn.microsoft.com/ContentServices/ContentService.asmx
Microsoft MSDN
Technical reference library
http://www.opendoar.org/tools/api.html
OpenDOAR
Academic research repository

http://www.strikeiron.com/ProductDetail.aspx?p=147
PhoneVal
Phone number validation service
http://www.strikeiron.com/ProductDetail.aspx?p=157
RealEDA Reverse Phone Lookup
Lookup address and name via phone
http://belay.extendthereach.com/api/
SRC Demographics
Demographic reference data

http://www.strikeiron.com/ProductDetail.aspx?p=136
StrikeIron Address Verfication
Global address verification service
http://www.strikeiron.com/ProductDetail.aspx?p=160
StrikeIron Do Not Call
Telephone number verification
http://www.strikeiron.com/ProductDetail.aspx?p=114
StrikeIron Insider Trading
Insider trading transaction information

http://www.strikeiron.com/ProductDetail.aspx?p=140
StrikeIron Phone Number Enhancement
Adds address and statistical data based on phone number
http://www.strikeiron.com/ProductDetail.aspx?p=233
StrikeIron Residential Lookup
Residential directory lookup and validation service
http://www.strikeiron.com/ProductDetail.aspx?p=103
StrikeIron Reverse Phone Lookup
Reverse phone lookup services

http://www.strikeiron.com/ProductDetail.aspx?p=105
StrikeIron Sales Tax Basic
Sales and use tax data service
http://www.strikeiron.com/ProductDetail.aspx?p=115
StrikeIron Super Data Pack
APIs for variety of reference data sources
http://www.strikeiron.com/ProductDetail.aspx?p=134
StrikeIron US Census
Census data information service

http://www.strikeiron.com/ProductDetail.aspx?p=106
StrikeIron Zacks Company Profile
Corporate profiles web service
http://www.talis.com/tdn/platform
Talis
Library 2.0 reference services
http://www.urbandictionary.com/api.php
UrbanDictionary
Slang dictionary lookup

http://www.strikeiron.com/ProductDetail.aspx?p=213
US Yellow Pages
Telephone directory
http://developer.yahoo.com/answers
Yahoo Answers
Community driven reference service
Search

http://aws.amazon.com/alexawebsearch
Alexa Web Information Service
Web site information and traffic data
http://aws.amazon.com/alexawebsearch
Alexa Web Search
Web Search Engine
http://a9.com/-/opensearch/
Amazon A9 OpenSearch
&nbsp;

http://www.gigablast.com/searchfeed.html
Gigablast
&nbsp;
http://code.google.com/apis/ajaxsearch/
Google Ajax Search
Web search components
http://code.google.com/apis/gdata/codesearch.html
Google Code Search
Code search service

http://desktop.google.com/developer.html
Google Desktop
Desktop search and gadgets
http://www.google.com/apis/
Google Search
Search services
http://www.kratia.com/api.php
Kratia
Democratic search engine

http://openapi.naver.com/
Naver
Korean search engine
http://www.vast.com/contact/api.htm
Vast
Structured web search
http://search.msn.com/developer/
Windows Live Search
Internet search

http://blog.wink.com/
Wink
Social search service
http://developer.yahoo.com/search/image/V1/imageSearch.html
Yahoo Image Search
Image search services
http://developer.yahoo.com/search/local/V2/localSearch.html
Yahoo Local Search
Local search service

http://developer.yahoo.com/search/myweb/
Yahoo My Web Search
Personalized search services
http://developer.yahoo.com/search/web/V1/relatedSuggestion.html
Yahoo Related Suggestions
Search suggestion service
http://developer.yahoo.com/
Yahoo Search
Search services

http://developer.yahoo.com/search/content/V1/termExtraction.html
Yahoo Term Extraction
Contextual search service
http://dev.aol.com/openauth
AOL Open Auth
Authentication services
Shopping

http://www.amazon.com/gp/browse.html/ref=sc_fe_l_2/103-1644811-9832630?_encoding=UTF8&amp;node=12738641&amp;no=3435361
Amazon eCommerce
Online retailer
http://www.amazon.com/b/ref=sc_fe_l_2/103-7845615-8014225?ie=UTF8&amp;node=15811391&amp;no=15879911&amp;me=A36L942TSJ2AJA
Amazon Historical Pricing
Historical product sales data
http://developer.authorize.net/
Authorize.Net
Internet based payment gateway services

http://www.avantlink.com/api.php
AvantLink
Affiliate marketing network
http://api.cnet.com/
CNET
Shopping services
http://webservices.cj.com/
Commission Junction
Online affiliate programs

http://www.strikeiron.com/ProductDetail.aspx?p=232
DataUnison eBay Research
eBay pricing and sales trend data
http://www.programmableweb.com/api/direct-textbook
Direct Textbook
Book price comparison service
http://developer.ebay.com/
eBay
Online auction marketplace

http://mecommerce.goodstorm.com/api/v1/
GoodStorm
Online retail ecommerce
http://www.programmableweb.com/api/google-base
Google Base
Platform for structure and semi-structured data
http://code.google.com/apis/checkout/
Google Checkout
Shopping cart services

http://www.pricerunner.com/partner/partner.html
PriceRunner
Shopping comparison engine
https://partners.shopping.com/app
Shopping.com
Online retail shopping
http://www.swapthing.com/user/wsRegistration.jsp
SwapThing
Community driven swapping site

http://www.upcdatabase.com/xmlrpc.asp
UPC Database
UPC lookup service
http://dev.live.com/expo/
Windows Live Expo
Online classifieds service
http://developer.yahoo.com/shopping/
Yahoo Shopping
Shopping services

http://www.zazzle.com/api
Zazzle
On-demand product creation service
Storage

http://www.amazon.com/gp/browse.html/103-7232640-5009469?node=16427261
Amazon S3
Online storage services

http://enabled.box.net/
Box.net
Online file storage
http://www.movedigital.com/docs/index.php/MoveDigital_API
MoveDigital
File delivery and management services
http://dev.omnidrive.com/
Omnidrive
Online storage services

http://dev.aol.com/xdrive_api
Open Xdrive
Online data storage service
http://documentation.openomy.com/index.php/Main_Page
Openomy
Online file system
http://www.tagalag.com/tools.html#api
Tagalag
Email tagging

http://zingosoft.com/tagfinder.htm
TagFinder
Tag extraction service
http://tagthe.net/fordevelopers
Tagthe.net
Tag recommendation service
http://www.tagtooga.com/tapp/db.exe?c=pg&amp;f=rest-api
TagTooga

Tag based Internet directory
Video

http://developer.searchvideo.com/index.php
Truveo
Video search
http://www.blinkx.com/devnet/registrationsplash
Blinkx
Video search

http://dave.tv/Programming-BasicConcepts.aspx
Dave.TV
Video distribution network
http://www.livevideo.com/api/default.aspx
LiveVideo
Video repository and user community
http://developer.revver.com/
Revver
Video services

http://www.veoh.com/restApiDoc/restReference.html
Veoh
Virtual television and video network
http://videodetective.com/xmlapi.aspx
Video Detective
Film trailers, cast, images, and related information
http://developer.yahoo.com/search/video/V1/videoSearch.html
Yahoo Video Search
Video search

http://www.youtube.com/dev
YouTube
Video sharing and search

Widgets

http://www.clearspring.com/docs/tech/apis
ClearSpring
Widget creation, distribution, and tracking services

http://www.google.com/apis/gadgets/index.html
Google Gadgets

http://dev.netvibes.com/
Netvibes
Personalized home page with widgets

http://www.pageflakes.com/Community/Developers/Documentation.aspx
Pageflakes
Personalized start page and widgets

http://www.klipfolio.com/
Serence Klip
Desktop gadgets

http://www.thespringbox.com/developers/
SpringWidgets
Widget platform

http://www.tagworld.com/-/widgets/WidgetSubmit.aspx
TagWorld
Social web services

http://dev.live.com/gadgets/default.aspx?app=gadgets
Windows Live Gadgets
Online gadgets service

http://msdn2.microsoft.com/en-us/library/ms723694.aspx
Windows Sidebar Gadgets
Desktop gadgets

http://widgets.yahoo.com/workshop/
Yahoo Widgets
Desktop widgets

http://www.yourminis.com/developers
Yourminis
Personalized start page
WIKI

http://dbpedia.org/docs/
DBpedia
Interfaz estructurada para solicitudes a Wikipedia

http://developer.jot.com/WikiHome/DevDocToc
JotSpot
Utilidad de colaboración con estilo Wiki
http://api.pbwiki.com/
PBwiki
Consumer wiki farm
http://www.wikimatrix.org/wiki/api
WikiMatrix
Servicio de búsquedas y comparaciones en Wiki


Fuente: http://techmagazine.ws/full-web-20-api-list/

saludos qwerty378