LinuxUserGroups.Info - Find Linux user groups in worldwide. - http://www.linuxusergroups.info/
Linux Forensics - User group dedicated to using linux to forensically examine computers. Open to all, topics be related to forensics and log exams. - http://groups.yahoo.com/group/linux_forensics/
Linux Chix - A community for women who like Linux, and for supporting women in computing. - http://www.linuxchix.org/
Linux Users' Groups Webring - Webring containing listings of many Linux users groups throughout the world. - http://nlug.org/webring/