SourceForge - The Complete Open-Source and Business Software Platform.
trustshare - Escrow payments for marketplaces in 5 lines of code
openDesktop.org - The website openDesktop.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
OSOR - OSOR is the Open Source Observatory, a project to provide a framework for developing and executing autonomous observations.
Codebase - Code hosting platform with project management tools built for professional development teams. Includes source tree browser, in-line comments, notes and a powerful ticketing system.