Unity - The multiplatform game creation tools for everyone.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
LibGDX - Libgdx is a Java game development framework that provides a unified API that works across all...
Shiva Engine - Shiva Engine is a cross-platform development solution.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
BuildBox - Buildbox is a new video game maker that is extremely easy to use.