Open Source Helpdesk

Open source helpdesk software have been popping around in the last years. If you want a features-rich and mature helpdesk solution, look first at RT or OTRS. Many other open source helpdesk solutions exist for smaller or defect tracking oriented needs.

Here a list of selected open source helpdesk solutions that worth a look for enterprise needs:

Bugzilla

Bugzilla is one example of a class of programs called "Defect Tracking Systems", or, more commonly, "Bug-Tracking Systems". Defect Tracking Systems allow individual or groups of developers to keep track of outstanding bugs in their product effectively. Bugzilla was originally written by Terry Weissman in a programming language called "TCL", to replace a crappy bug-tracking database used internally for Netscape Communications. Terry later ported Bugzilla to Perl from TCL, and in Perl it remains to this day.

RT - Request Tracker

RT is an enterprise-grade ticketing system which enables a group of people to intelligently and efficiently manage tasks, issues, and requests submitted by a community of users.

BugTracker.NET
OTRS - Open source Ticket Request System

OTRS is an Open source Ticket Request System (also well known as trouble ticket system) with many features to manage customer telephone calls and e-mails. The system is built to allow your support, sales, pre-sales, billing, internal IT, helpdesk, etc. department to react quickly to inbound inquiries.

Double Choco Latte
eTicket

eTicket is a PHP-based electronic support ticket system that can receive tickets via email (pop3/pipe) or a web form. It also offers a ticket manager with many features.

Eventum
Help Desk Reloaded
Helpdesk Issue Manager
Liberum Help Desk
One or Zero

OneOrZero Helpdesk and Task Management System is a powerful enterprise helpdesk system used by companies and groups large and small to manage information and requests in their organization.

OS Ticket

osTicket is a widely-used open source support ticket system. It seamlessly integrates inquiries created via email and web-based forms into a simple easy to use multi-user web interface. Easily manage, organize and archive all your support requests and responses in one place while providing your clients with accountability and responsiveness they deserve.
osTicket is an attractive alternative to higher-cost and complex customer support systems; simple, lightweight, reliable, open source, and easy to setup and use. The best part is, it's completely free.

Sinergia

Sinergia is a web based framework for developing help desk management solutions in .NET 3.0

ZenTrack

Zentrack is a fully customizable help desk, bug tracking, and project management system. It is designed for systems with less than 10,000 users