CRT

CRT is no longer actively maintained. It was a fun little project, but there are much better systems out there that do everything CRT aimed to do and more! I quite enjoyed Playnite, for example.

Original description follows.
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CRT is a desktop app for managing your games. It's designed for use with emulators, but it can be used for any game (or app) as long as it runs on your computer!

It gives you total control on how your games run, how they're organised, and how they're presented. Games can be sorted and filtered in a variety of methods, and its straightforward design means you can get to playing your games sooner rather than later.

You can contribute to CRT over on GitHub.