activeCollab : An easy to use, web based, open source collaboration and project management tool

activeCollab is an easy to use, web based, open source collaboration and project management tool. Set up an environment where you, your team and your clients can collaborate on active projects using a set of simple, functional tools.

Highlights

1. Easy to install and easy to use
2. Web-based. After installation only thing you'll need to use it is web browser
3. 100% open source, 100% free
4. No limitations on number of projects, clients, team members...
5. Per project permissions