What's Tuleap ?
Tuleap Open ALM is a Libre and Open Source software forge crafted in PHP/MySQL. Development occurs in realtime on http://tuleap.net You can find mirrors on Github
Use case, screenshot & more on http://tuleap.com.
How to use it ?
You should follow the installation guide available on tuleap.net.
I need help !
The tuleap-devel mailing list will be more than happy to help you to get the most of the software, don't be shy we are nice with new comers.
I want to contribute !
You can start looking at the tuleap developer guide and of course you should subscribe tuleap-devel mailing list.