Gideros Release version
3D game engine/framework in C, with Luajit and Python bindings now
Making multi-player gamedev simpler since 2017
FlightGear Flight Simulator: free open-source multiplatform flight sim
A modern, cross-platform Quake game engine based on FitzQuake.
Open and edit the archive files used in over 4200 games.
3D Engine c++
Odamex is a free, cross-platform, modern client-server Doom engine
A cross-platform port of Hexen II game.
GemRB is a portable open-source implementation of the Infinity Engine
WW2 U-boat simulation
Hardcore 3D space shooter with spaceship upgrade possibilities.
X3D is the open-standard format for 3D graphics scenes on the Web.
Air traffic control tower and radar simulator (solo + multi-player)
Zoomable user interface (ZUI) with file manager, file viewers and more
Cerberus Content Management System