TASEmulators / BizHawk

BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.

mmvanheusden / SteamDepotDownloaderGUI

Downgrade Steam games to older versions with ease using DepotDownloader

dsda-org / dsda-doom

This is a successor of prboom+ with extra tooling for demo recording and playback, with a focus on speedrunning and quality of life.