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. An ideal, easy to use and install helpdesk solution for any website.
eTicket offers many features and can be easily skinned to the look and feel of your website.
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 panels
- Email Intervals to prevent autoresponder loops
- Max Allowed to limit maximum tickets user can have opened
- Filters to remove messages in replies
- Accept attachments and limit size
- User Features: Login with email and any ticket assigned to you
