IssueTrackerProduct is a help desk/issue/bug tracker web applicationfree and Open Source.

screenshots:

Add a new issue window:

Add a quickie request:

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GLPI is the Information Resource-Manager with an additional Administration- Interface. You can use it to build up a database with an inventory for your company (computer, software, printers…). It has enhanced functions to make the daily life for the administrators easier, like a job-tracking-system with mail-notification and methods to build a database with basic information about your network-topology

Features:

1) the precise inventory of all the technical resources. All their characteristics will be stored in a database.

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Help Desk Issue Manager is an open source project to create a robust and generic helpdesk management system for all kinds of helpdesks. It is being initially developed for use by the ICT helpdesk of Trinity High School and the Central Manchester City Learning Centre.

It is a web-based system using PHP for the interface and PostgreSQL as a back-end database.

Features: Multiple functional domains – allowing the system to hold multiple issue management systems …

Help Desk Reloaded software supports; trouble ticket prioritization, multiple customer support technicians, help desk search, and many other features.

from the developer:

We are confident you will enjoy our help desk support software. The help desk is cross platform compatible and can be used on almost any OS. We have tested the help desk software on Free BSD, Linux, Windows 2000 & 2003 and Apple OS X

Why should you use it …

Help Desk  Lite is very simple and free help desk software what provides two major functions every customer service system must support: service ticket tracking and operator assignment. It is a CGI script written in Perl and it is intended for those, who prefer corresponding with customers using their favorite email program rather than through completely web based help desk.

Features: Email alerts on every new customer inquiry. Custom fields. Add virtually unlimited number of …

Eventum is a user-friendly and flexible issue tracking system that can be used by a support department to track incoming technical support requests, or by a software development team to quickly organize tasks and bugs.

screenshot:

find all about Eventum at http://forge.mysql.com/wiki/Eventum/

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. An ideal, easy to use and install helpdesk solution for any website or organization.

Software Main Features: Supports aliases/piping with perl gateway Supports POP3 login with optional crontab. Uses Perl gateway, PHP backend, and MySQL database Handles unlimited emails Admin/Supporter/User …

Soffront Employee Helpdesk manages employee support tickets from submission to resolution. Reduce IT support costs, increase employee productivity and enhance customer retention with Soffront IT Helpdesk.
Create tickets and assign them to IT helpdesk agents automatically. Configure the workflow to match your IT support process. Dynamically generate action buttons that guide helpdesk agents through the defined process. Know where every ticket stands in the resolution process and ensure no ticket slips through the cracks. With …

Fenestra’s AnswerDesk is a tool for communication. Whoever enters information, it is immediately available to service and support staff, field engineers and account managers. Major issues can be highlighted and absorbed fast. When the client calls, your account manager will know what’s on their mind and who is dealing with it.

from the vendor:

The core AnswerDesk system is intuitive, quick and reliable. All the necessary information is quickly available. We do not force each …

Abacus Systems develops Help Desk and IT Service Management software solutions for enterprise organizations. Aegis is a customizable and cost-effective IT management solution. It can be used for both internal staff and external customer support. Each module can be stand alone or integrated with the others. 

Aegis has built-in facilities where users can create data entry and web entry forms easily without development effort or simply use the setups we provide, straight out of the box. Either way, …