Wiki hilsz.com: Sugar

http://www.sugarforge.org/content/open-source
http://www.sugarforge.org
http://www.sugarcrm.com/crm/community/sugarcrm-community.html

http://www.vtiger.com/index.php

http://www.howtoforge.com/installing-sugarcrm-community-edition-on-fedora-17#content