PCSX2 - The Playstation 2 Emulator

Descent 3 by Outrage Entertainment

OpenAL Soft is a software implementation of the OpenAL 3D audio API.

Cross-Platform Level Editor

OpenRW "Open ReWrite" is an un-official open source recreation of the classic Grand Theft Auto III game executable

Compatible client of Ace of Spades 0.75

Glide/DirectX implementation on D3D11/12

Unreal Tournament Engine Reimplementation

DOSBox Pure is a new fork of DOSBox built for RetroArch/Libretro aiming for simplicity and ease of use.

A 100% compatible replica of the famed SB 1.0 sound card

Reverse-engineered ports of Build games using EDuke32 engine technology and development principles (NBlood/Rednukem/PCExhumed)

waifu2x(original : https://github.com/nagadomi/waifu2x) re-implementation in C++ using OpenCV [NO LONGER UPDATED]

Vanilla Conquer provides clean, cross-platform builds of the C&C Remastered Collection and the standalone legacy games.

BSD-licensed Yamaha FM sound cores (OPM, OPN, OPL, and others)

An experimental emulator

A fork of Gecko 1.8.1 to improve support for the modern web in older versions of Windows

Roguelite dungeon crawler game

waifu2x converter GPU Optimization in OpenGL Shader

Flycast is a multiplatform Sega Dreamcast emulator. NOTE: No longer actively developed, use upstream repo for libretro from now on - https://github.com/flyinghead/flycast

Descent 3: Piccu Engine, a version of the game Descent 3 focused on quality-of-life improvements.

Mod for UrbanAssault (Replace original game engine)

Recreational Software Design's GameMaker product, released in 1994

Battle tank combat racing!

A screensaver with a mesmerizing display of dynamically generated particle effects

ReelMagic Fork of DOSBox

Software rendering focused Descent port.

The DOOM Construction Kit

DOSBox Pure is a new fork of DOSBox built for RetroArch/Libretro aiming for simplicity and ease of use.

A complete decompilation of Retro Engine (v5)