OPT is a PHP general-purpose virtual commonplace for customers and developers to collaborate in developing projects - the system provides documents archive, e-mail archive, request tracker, task management, knowledge base, news administration, newsletter support and a lot of other features - some project-based, some system-based.
This is a stable release, tested for more than eight months on a production machine with real customers.
This release requires LAMP. We are working on migrating to Windows solutions as well.
The system is licensed under GPL.