Minecraft map editor and mod
3D engine with modern graphics
Flexible level editor
An OpenGL RTS game engine written in C
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Custom Map File Generator for C-evo
A Linux game inspired by the famous arcade tank battle game of the 80s
Java3d scenegraph editor
MIT Licensed Open Source version of Torque3D from GarageGames
Cross Platform Professional Procedural Terrain Generation & Texturing
3D Procedural Modelling and Procedural Texturing Tool in OpenGL/C++
Modern 3D engine and IDE written using C# and C++.
A tool for creating voxels for the DelphiDoom Engine
A 2D game engine and level editor
MCEdit: World Editor for Minecraft
IRB is a game creation toolkit
.NET - VISUAL BASIC NVIDIA +ATI PHYSX SLIMDX DIRECTX 9 -ENGINE/WRAPPER
Realtime Media Engine (2D/3D/Audio)
2D space game with semi-realistic physics
Pear3DEngine is a modern and modular 3D development framework
A 2D Side Scrolling Platformer Game
Easy Terrain editing and Heightmap creation
Add-ons for the 3D Terrain & Landscape Editor Artifex Terra 3D
DREAM is an Open Source GCS