I'm wondering if anybody has come across a comprehensive list of free sources for data (as a web api) or web services. I'm looking to start a new project to tinker with in my spare time and I am wondering what interesting data is available to play with. It seems like many api services such as last.fm or google search don't exist or are no longer free. Possible examples of what I am looking for
- information about a given ip address
- mapping api's
- information about books, movies, music
- information about places, businesses, attractions
- meteorological, financial or other scientific data
- shopping, products
I would appreciate any suggestions you may have about interesting data freely available through the web. thanks