Best open source projects site in java, vb, ms office, c, c++, Database programming?

Can any one tell me good open source projects site in java, vb, ms office, c, c++, Database programming, downloadeble, editable, tools

Best open source projects site in java, vb, ms office, c, c++, Database programming?
best open source project sits


http://sourceforge.net/


SourceForge.net is the world's largest Open Source software development web site, hosting more than 100,000 projects and over 1,000,000 registered users with a centralized resource for managing projects, issues, communications, and code. SourceForge.net has the largest repository of Open Source code and applications available on the Internet, and hosts more Open Source development products than any other site or network worldwide. SourceForge.net provides a wide variety of services to projects we host, and to the Open Source community.