Mantis Bug Tracker is a free and open source, web-based bug tracking system. It is written in the PHP scripting language and works with MySQL, MS SQL, and PostgreSQL databases and a webserver. MantisBT can be installed on Windows, Linux, Mac OS, OS/2, and others. Almost any web browser should be able to function as a client. Moreover MantisHub is available as commercial hosted solution of MantisBT. Supports any platform that runs PHP (Windows, Linux, Mac, Solaris, AS400/i5, etc) Available in 68 localizations. Customizable Issue Pages Multiple Projects per instance Support for Projects, Sub-Projects, and Categories. Users can have a different access level per project Changelog Support Roadmap My View Page Search and Filter Full Text Search Simple/Advanced Filters Shared Filters (across users / projects) Built-in Reporting (reports / graphs) Custom Fields Email notifications Users can monitor specific issues Attachments (can be saved on webserver or in database - can also backup to an FTP account) Issue Change History RSS Feeds (news, issues matching saved filters, issues matching a specific project) Customizable issue workflow Sponsorships Support - users are able to place bounties or sponsorships for specific issues, also developers can track such sponsorships / payments. Anonymous Access Signup with Captcha and Email Confirmation. Self-Service Reset Password Support Export to csv, Microsoft Excel, Microsoft Word Ability to extended functionality through hook (custom) functions. Ability to extended functionality through plugins. Reporting issues via Email (available as a patch for 1.1.x and EmailReporting Plugin for 1.2.x]]) Reporting Issues via a custom form on your website (Anonymantis). Source Control Integration (GIT, SVN and CVS). No limit on the number of users, issues, or projects. Wiki Integration (optional) Time Tracking Ability to send messages to messages to other users in regards to a specific issue.