motionEyeOS - A Video Surveillance OS For Single-board Computers
Unity - The multiplatform game creation tools for everyone.
AI Cam - Mobile webcam software with artificial intelligence (ai). Video surveillance via the Internet with automatic event recognition
Godot Engine - Feature-packed 2D and 3D open source game engine.
Unifi Video - Unifi Video by Ubiquity is designed specifically around Ubiquiti range of cameras and is free.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.