CTFs as you need them
Open game and rendering engine packed into a JavaScript framework
Desktop/Android/HTML5/iOS Java game development framework
Unity3D Client And C# Server Framework
Gideros Release version
All-In-One program that combines multiple Fortnite Dev Account tools.
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++.
Example code for creating a 2D platform game in Java.
Build Cross-platform Applications
Lego Island 2 Texture Animator
3D .NET engine for Windows, Linux, Mac
.NET - VISUAL BASIC NVIDIA +ATI PHYSX SLIMDX DIRECTX 9 -ENGINE/WRAPPER
Open Game Bootstrap
Mahasona engine is an open source game engine.
Built to be ease of use, with no programming knowledge, Multi-platform
3D Game engine
Small OpenGL based game enegine
This pack add's custom object and rides into your "RCT3 Platinum" game
A tool for editing OHRRPGCE RPG files
An Animated 2D Game in the Turbo Compiler.
UtiliGame is a light-weight game engine written in Java.
AdventureMap peripherals for ComputerCraft