PolarHelp

Manage and deliver support services to your employees and customers through a central web-based help desk portal.

Email integration: Manage email flow with help desk integrated with multiple email accounts and customize email notification templates using scripting language. Integrate any other system through API.
Easily integrate any system through RESTful API, e.g. CRM, HR systems, bug trackers and desktop software.
Build your own reports: You can easily build new reports using client and server side Java Script. Incident Management and Service Level Management: Use best practices from ITIL.
Source code available
Polar Help Desk 5 is open-source software.