Unity - The multiplatform game creation tools for everyone.
TiddlyMap - An interactive concept- and mind-mapping plugin for the personal note-taking software TiddlyWiki based on the Vis.js library. It's free and open-source!
Godot Engine - Feature-packed 2D and 3D open source game engine.
Minzel - Minzel is a beautiful and free mindmapping tool built for creatives and gives you the power to...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Wisdomap - Wisdomap Medicine is a study aid that helps medical students create differential diagnoses and suitable management plans from a presenting complaint and structured revision notes.