
SourceForge
GitHub
GitLab
BitBucket
openDesktop.org
Gitea
Launchpad.net
OSOR
Satscape
Heavens Above
See A Satellite Tonight
Celestia
ISS Detector
Orbitron
Stellarium Portable
Solar Model 3D
SourceForgeGitHub - 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.
Heavens Above - Website for tracking Satellites, Space ships and other space objects.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
See A Satellite Tonight - Free web app to explore satellite locations.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
Celestia - Real-time 3D visualization of space