Freely Available Web Services/APIs [closed]

Question

I'm building some Silverlight applications in my spare time, and I wanted find some freely available web services or APIs that I can call. Any suggestions?

Answer 1

There is a massive list at Yahoo, exposed via YQL (yahoo query language). It even exposes sites that do not have web services as web services.

Answer 2

There's the Google API (there are a lot of Gogle APIs, to tell the truth) and the Stack Overflow API to name a couple.

Hmm... let's add some more:

• Stack Overflow API
• Google API
• Google Maps API
• Yahoo Maps API
• Bing Maps API

Answer 3

Facebook - http://developers.facebook.com/docs/api