ZoneMinder - ZoneMinder is a free and open-source piece of security software that can be used at home or in your business. The software puts you in control of all of your data, and it is exceptionally easy to setup. Read more about ZoneMinder.
Unity - The multiplatform game creation tools for everyone.
iSpy - iSpy is software that allows the user to view and control video surveillance cameras. The software began development in 2007 and now has over 2 million users around the world, according to the software's website. Read more about iSpy.
Godot Engine - Feature-packed 2D and 3D open source game engine.
MotionEye - motionEye is a web frontend for the motion daemon, written in Python.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.