SourceForge - The Complete Open-Source and Business Software Platform.
BMC Software - BMC Software is a solution for companies to help them in running and reinventing their businesses with scalable and modular solutions to IT problems and management.
openDesktop.org - The website openDesktop.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
OSOR - OSOR is the Open Source Observatory, a project to provide a framework for developing and executing autonomous observations.
monday.com - The most intuitive platform to manage projects and teamwork