GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
openDesktop.org - The website openDesktop.
Redmine - Flexible project management web application
SourceForge - The Complete Open-Source and Business Software Platform.
Bugs Everywhere - Bugs Everywhere is a “distributed bugtracker”, designed to complement distributed revision control systems.
Freecode - Freecode (formerly known as Freshmeat) is one of the legit open source development platforms that will be the key for developers and programmers to have a streamlined process via having enhanced collaboration and coding leverages.