opsdo has two goals - to allow people to search many information sources which mainstream search engines do not cover well and to allow people to search groups of such sources -- e.g. RottenTomatoes, IMDb and Amazon.
Your Mashup not listed on ProgrammableWeb yet? Tell us about it and get listed.
flightwise (formerly fboweb.com)
Flickr Api Explorer
Yahoo! Search API Tutorial
Sample Amazon ECS Store in Java
APIs Make Money For Amazon
Explore Amazon Web Services with AJAX
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.