Doom - Doom is a science fiction horror-themed first-person shooter video game in which players assume the...
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
GZDoom - ZDoom is a family of enhanced ports of the Doom engine for running on modern operating systems.
Todo - Todo is a to-do and task list app.
Freedoom - Freedoom is a WIP a complete free content game based on the Doom engine.
Prodeus - Track your time learning on YouTube to earn your free degree