Collabtive is a program that can assist you in project management. It uses PHP and Mysql popular (Smarty) architecture and involves AJAX applications. It is an easy-to-use, stable, free open source software. Functions cover: project management, task management, online chat, milestone management, event tracker, etc.
Collabtive's core philosophy: Each project is composed of several task lists, and each task list is composed of several specific tasks. Such level-by-level subdivision can make our projects more reasonable and clear, and fully clarify the responsibilities and tasks of each member of the project team.