Wrike - Wrike is a flexible, scalable, and easy-to-use collaborative work management software that helps high-performance teams organize and accomplish their work. Try it now.
SourceForge - The Complete Open-Source and Business Software Platform.
Basecamp - A simple and elegant project management system.
openDesktop.org - The website openDesktop.
ProjExec - ProjExec is an enterprise-class social project management solution tightly integrated with...
OSOR - OSOR is the Open Source Observatory, a project to provide a framework for developing and executing autonomous observations.