An open source re-implementation of RollerCoaster Tycoon 2
Sandbox video game with a powerful physics engine
Endless Sky is a sandbox-style space exploration game
Simple Beat Saber Mod Installer
Open source simulation game based on Transport Tycoon Deluxe
3D space trading and combat game
Open source clone of Theme Hospital
HTML5 Phigros chart player/simulator
RISC-V CPU simulator for education purposes
A free transportation simulator game
A planetarium software that shows a 3D simulation of the night sky
Write programs in assembly that battle each other in Corewar
Air traffic control tower and radar simulator (solo + multi-player)
... the open-source glide computer
Old style soccer game with many exciting features
X3D is the open-standard format for 3D graphics scenes on the Web.
Naval trade simulation in the north and baltic sea during 1250 - 1500
Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
realistic driving simulation + functions for 2D/3D graphics