Unity - The multiplatform game creation tools for everyone.
Portal - Financial Aid Award Letter, - Messages and Calendar, - Grades.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Quantum Conundrum - Quantum Conundrum is a First-person Perspective game with strong Sci-fi, Puzzle-Platform, and Single-player elements published by Square Enix and developed by Airtight Games.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Narbacular Drop - Using two interconnected portals you can place on walls, ceilings and the floor, you must navigate your way through a sentient dungeon.