One framework for creating powerful cross-platform games
Open Source MMORPG Framework
CTFs as you need them
A lightweight game server framework implemented with Actor Model
A lightweight online game framework
A Rust framework for building Minecraft servers
Open source reimplementation of GTA San Andreas game engine in Unity
FiveM is a modification for Grand Theft Auto V
JavaScript framework to build game engines, games, emulators and apps
Linux game server utility.
Program and Game Manager for DOS
A Forge mod that implements SpongeAPI
A fast, scalable, distributed game server engine/framework for C++
Naval Robocode is a programming game for Java.
Dark Age of Camelot server emulator
A game server framework in Go (golang)
Massively multiplayer online game server and client framework
creator : Nikola Lukic about : Visual JS 2d canvas multiplatform game
.NET based API for Stealth Client
Mud Server in Python Language playable via web browser
HLLaucnher is in beta stages.
C++ game libraries plus server.