MantisBT - Bug Tracking System in PHP

MantisBT is a web-based bug tracking system written in the PHP and works with MySQL, MS SQL, and PostgreSQL databases and a webserver. It supports multiple projects in a single instance. Its features set include Full text search, Built in Reports, Custom fields, Change History, RSS Feeds, Export to csv, Excel, Word, Upload attachments, Wiki Integration ,LDAP Integration, SOAP interface, Support for mobile devices, localization support and lot more.