Open Source Initiative Organization and information resource for promotion of free software to the business as well as the development community. www.opensource.org/
Slashcode: Slash Open Source Project Source code and database originally used to create Slashdot, now released under GNU license. slashcode.com/
Open Source Development Lab Sponsors key industry projects, including industry initiatives to enhance Linux for use in corporate data centers and telecommunications networks. www.osdl.org/
Apple Open Source: Darwin Official site, featuring download, source code, FAQs, and more. developer.apple.com/darwin/
Open Source Applications Foundation Mission is to create and gain wide adoption for software applications of uncompromising quality using Open Source methods. www.osafoundation.org/
SGI Open Source Repository Featuring SGI's GPL'ed Linux kernel patches, XFS: a 64-bit scalable journaling file system, and other free software by SGI employees. oss.sgi.com/