Free self-hosted help desk & shared mailbox
Best open source helpdesk & shared mailbox
Open source help desk ticketing system
HelpDEZk is a powerfull software that manages requests/incidents.
Issue tracking and team collaboration system
Open source support tracking in your browser
B1ST PHP Ticket System comes with reach features
Keep track of all your job costs, make sure you don't lose money
Build a collaborative software development site (software forge).