Mailtrack.io - The best email tracking solution I've found. Free
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.
ReadNotify - ReadNotify enables the user to know when email is sent and the reciever reads the email.
Portal - Financial Aid Award Letter, - Messages and Calendar, - Grades.
GetNotify - GetNotify is a free email tracking software solution.
Portile - Portile is a 2d, tile-based take on Narbacular Drop (more than Portal, because momentum plays a big...