developer platforms

search @google: http://www.google.de/search?sourceid=navclient&ie=UTF-8&rlz=1T4GGLJ_enDE273DE275&q=developer+platforms
programmableweb http://www.programmableweb.com/
apple http://developer.apple.com/de/
amazon http://aws.amazon.com/
facebook http://developers.facebook.com/
ebay http://entwickler.ebay.de/
zanox http://webservices.zanox.com
LinkedIn Opens Applications Platform with Google, Amazon:  http://www.linkedin.com/static?key=application_directory
Yahoo Widgets: http://widgets.yahoo.com/tools/
Yahoo Mobile Widget Platform: http://mobile.yahoo.com/developers: Mobile widget platform:  
SpringWidgets: http://www.thespringbox.com/developers/: (Widget platform)
WidSets: https://dev.widsets.com/index:  (Mobile widgets service)
Widgetbox: http://docs.widgetbox.com/developers/
TagWorld:  http://www.tagworld.com/  (Social web services:)
Clearspring  http://www.clearspring.com/services/widgetmedia/monetize   (Widget creation, distribution, and tracking services):
Netvibes: http://www.netvibes.com/     http://blog.netvibes.com/?2009/01/21/235-widgets-update-weather-to-do-lists-and-a-new-calculator
Pageflakes:  http://www.pageflakes.com/
Serence Klip: http://developer.klipfolio.com/
Skicow: http://www.skicow.com/article/Skicow-API-Developer-Guide/18/42
Windows Live Gadgets: http://gallery.live.com/
Windows Sidebar Gadgets:  http://vista.gallery.microsoft.com/vista/SideBar.aspx?mkt=en-us
yourminis: http://www.yourminis.com/
Google Homepage:
Microsoft start.com: