• VA Software (www.vasoftware.com)- With its open source Technology Group (OSTG), VA Software manages many of the premier open source sites on the Web. It maintains open source development sites Freshmeat (www.freshmeat.net) and Source Forge (www.sourceforge.net),and IT Manager's Journal (www.itmanagersjournal.com).
• IBM (www.ibm.com/linux)- Because IBM has taken on the lion's share of lawsuits against Linux and done a lot to further Linux, especially in the enterprise area, it deserves a mention here. There are many good resources for Linux at IBM's Web site, including excellent white papers covering Linux in business.
• Ibiblio (www.ibiblio.org)- Contains a massive archive of linux software and documentation (www.ibiblio.org/pub/linux).