Atmosphère is a work-in-progress customized firmware for the Nintendo
DOSBox Staging is a modern continuation of DOSBox
GZDoom is a feature centric port for all Doom engine games
A free/open source client and automation tool for Ragnarok Online
Cross-platform 2D and 3D game engine with modular architecture
Free game engine for development of desktop, mobile, and web games
API and runtime that allows access to VR hardware
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
SnapKey: Open Source Alternative to Snap Tap & SOCD
Simple, open source crosshair application called AdrixCH
Free and open-source emulator for Nintendo 64
Modern Windows-optimized fork of the FCEUX NES/Famicom emulator.
Synthetic Vision/Sectional Maps for experimental aircraft.
Cross-platform port of Arx Fatalis, a first-person role-playing game
Amazon Lumberyard is a free AAA game engine
DeSmuME is a Nintendo DS emulator
2D Game Engine with Lua Scripting made on top of SFML
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Automatically kill Windows processes using search criteria.