Portal - Financial Aid Award Letter, - Messages and Calendar, - Grades.
Narbacular Drop - Using two interconnected portals you can place on walls, ceilings and the floor, you must navigate your way through a sentient dungeon.
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.
GlPortal - A free open source game with teleportation.
Promethius - Graphic style similar to Portal. Time based puzzles with a twist.
Mari0 - What happens when you mash Super Mario Bros. and Portal together?