Issuetrak - Issue tracking software for help desk and customer service
Communifire - Enterprise Social Collaboration Software
Deskun - Deskun is a Help Desk system inside Gmail. It enables you to support customers directly from your mailbox, manage projects, and use free features for Gmail.
Workplace by Facebook - Connect everyone in your company and turn ideas into action.
Kapdesk - Kapdesk offers support teams with a helpdesk software to streamline support tasks.
DigitalChalk - Online Training Software and Learning Management System (LMS)