Playnite is an Open Source manager and launcher for video games with support for Steam, Battle.net, Origin, GOG, and Uplay through a sleek, unified interface.
ReShade is an Open Source tool that helps improve the look of older games on modern video cards and allows the addition of newer display/video technologies to older games that do not support those technologies.
HxCFloppyEmulator provides hardware/software solutions to replace old floppy disk drives and floppy support with more modern solutions USB, SDCard, network, etc.
Moonlight Game Streaming Project allows you to play your PC games on almost any device, whether you're in another room or miles away from your gaming rig.
VoiceBot will help you take command of your games, applications, keyboard shortcuts, mouse, and even execute complicated macros and scripts - all with your voice.