Unity - The multiplatform game creation tools for everyone.
Phabricator - Phacility - Phabricator
Godot Engine - Feature-packed 2D and 3D open source game engine.
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.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.