Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
SourceForge - The Complete Open-Source and Business Software Platform.
Teamgantt - Intuitive project planning and collaboration. Beautiful Gantt charts, task-level communication, file sharing, resource management and more.
openDesktop.org - The website openDesktop.
Basecamp - A simple and elegant project management system.
OSOR - OSOR is the Open Source Observatory, a project to provide a framework for developing and executing autonomous observations.