Open Source Resources Page

SourceForge.net is the world's largest Open Source software development website,
with the largest repository of Open Source code and applications available on the Internet. SourceForge.net provides free services to Open Source developers.
http://sourceforge.net/

Open Source Initiative (OSI) is a non-profit corporation dedicated to managing and promoting the Open Source Definition for the good of the community, specifically through the OSI Certified Open Source Software certification mark and program.
http://www.opensource.org/