Stride (formerly Xenko), a free and open-source cross-platform C# game
Simple GTK# Paint Program
A pure Go game engine
Gideros Release version
xBRZ: "Scale by rules" - high quality image upscaling filter by Zenju
Opensource Created Custom Viewers For Virtual Worlds like SecondLife.
Bloxshade installer source code.
LDraw™ editor for LEGO® style digital building instructions.
Emulator of the 8-bit computers Sharp MZ-800 / MZ-700 / MZ-1500
A book reader for Nintendo DS
Generates XCI/NSP/HFS0/ExeFS/RomFS/Certificate dumps from Switch
3D C++ Game Engine - yet another open source game engine
A mapping tool for text-based games like text adventures, MUDs, etc.
Jigsaw And Slider Puzzle Game
Advanced rhythm game for Windows, Linux and OS X
3D .NET engine for Windows, Linux, Mac
Map render tool for 2d RTS games
evolution for vegastrike SpaceSim/Combat/Trade game
An expanded XNA game creation framework
3D Game engine
TurboSphere is an easy to learn and powerful JS based game engine.
Invading aliens type game using SDL