The HTML5 Creation Engine
LayaAir is an open-source 2D/3D engine
lua dev plugin for unreal engine 4 or 5
Gradient Bang is an online multiplayer universe
The Pokémon API
Fast and multi-source CLI program for managing Minecraft mods
Multi-platform 2D and 3D game engine
3D and 2D game engine written in Rust
Access GameLift resources and integrate GameLift into your Unity game
RTS game with the theme of Strategy by Design
FlightGear Flight Simulator: free open-source multiplatform flight sim
Air traffic control tower and radar simulator (solo + multi-player)
Chess Database and PGN viewer
Cooperative multiplayer graphical RPG and adventure game
All-In-One program that combines multiple Fortnite Dev Account tools.
Utilities for CoffeeMUD operators on Linux
A multiplatform medieval 3D MMORPG
Retro style, multi-platform soccer game
GEDKeeper - opensource and crossplatform genealogy management program
Arianne is an engine to develop multiplayer online games like Stendhal
Let it snow on your desktop