spTIcket

spTicket integrates Joomla! (compatible with Joomla! 1.5, 1.6 ,1.7.x, 2.5.x and 3.x ) and the osTicket v1.7 Stable platform. It allows for displaying osTicket v1.7 Stable content within the Joomla! component-area but also ships with Joomla! modules.
It is not a bridge.It is a standalone help desk extension.

spTicket is a online Joomla Support Ticket System Component or Extension. It seamlessly integrates inquiries created via email, phone and web-based forms into a simple easy-to-use multi-user web interface.

Features
Easy installer using joomla Extensions menu(No need ftp to upload files for fresh installation)
Works with Jquery,Mootools,Prototype(No conflict mode)
Works with most of the joomla templates.
Manage osTicket configuration and osTicket users from Joomla admin panel
Ships with Joomla! modules
osTicket interface displays into native Joomla! content
Web and Email Suppport
Auto Response
Canned Replies
Internal Notes
Help Topics
Alerts and Notices
Role-based Access
Assign & Transfer Tickets
Joomla Title,Description(SEO)
Knowledge Base/FAQ in Frontend
No encoding loader needed
Integrated with joomla login(front end only)
My tickets joomla module
No iframe
Unlimited Installation in unlimited Domains
GNU/GPL license http://www.gnu.org/copyleft/gpl.html
Joomla frontend admin/staff panel
Joomla backend admin/staff panel

Minimum requirements
Joomla! 1.5.x(compatible with Joomla! 1.6.x ,1.7.x , 2.5.x and 3.x also)
osTicket v1.7 Stable
PHP version 5.2 or newer
MySQL 5 or newer
PHP-module CURL active
PHP-module SimpleXML active
PHP-module JSON active