It shows all indie games that were added to PixelProspector.com from 2009-2013.
New game additions can now be found on twitter and these 3 sites by PixelProspector:
Also consider to watch some of the compilation videos (235 Free Indie Games in 10 Minutes etc.)
Free Indie Games
List Of Games That Are Still In Development
The following games are still in development. Most of them offer demo versions. Moreover here some more games that are canceled or on hold.
Commercial Indie Games
Thanks to Brent “dumbmanex” Anderson for drawing the above picture.