I made a mod launcher for classic Doom (specifically, GZDoom) because I wasn't a fan of what currently exists. CleanDoom focuses on simplicity and usability.
If anyone here is a Doom fan, give it a try and let me know what you think!
A mod launcher is a program that lets you set up and configure mods for a game, then launch the game with everything set up for you. They exist because configuring everything yourself can be a real pain.