Godot Engine - Feature-packed 2D and 3D open source game engine.
SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
Unity - The multiplatform game creation tools for everyone.
Accelerated - Online community to break into tech & VC
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
VC Starter Kit - Everything you need to look like a Venture Capitalist