Teambox is twitter like project management and team collaboration software. Teambox is a web-based, quality collaboration software with a simple and clean user interface.

Teambox’s overview screen is a Twitter-like feed of activity and updates. You can post updates on a project. Stay in touch with your team all the time, across all your projects, easily.

This project management software supports:

• Multiple projects
• Status updates
• Document attachments

This open source software is written in Ruby on Rails and you can use a hosted version or can download a copy to host your very own.