Desktop/Android/HTML5/iOS Java game development framework
CTFs as you need them
Unity3D Client And C# Server Framework
Gideros Release version
All-In-One program that combines multiple Fortnite Dev Account tools.
An isometric arcade-style game of skill, puzzles and exploration
Game engine supporting many 3D/2D formats and graphic effects
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Modern 3D engine and IDE written using C# and C++.
3D .NET engine for Windows, Linux, Mac
Mahasona engine is an open source game engine.
Built to be ease of use, with no programming knowledge, Multi-platform
UtiliGame is a light-weight game engine written in Java.
AdventureMap peripherals for ComputerCraft
Cross-platform 2D game engine
A 2D Java game engine
A generic C++ MUD server featuring a strategy-style hexagon map