A planetarium software that shows a 3D simulation of the night sky
Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets, nebulae and others things like ground, landscape, atmosphere, etc.
A free transportation simulator game
Simutrans is a cross-platform simulation game where players try to successfully manage transportation systems between places by land, air, and water for passengers, mail, and goods. Planes, ships, trains, trams, trucks, buses, or monorails are at your disposal, but factories operate based on contracts and passengers can only travel to their set destinations.
A 3D simulator game where you can drive, fly, and sail
Rigs of Rods is a 3D simulator game where you can drive, fly and sail various vehicles using an accurate and unique soft-body physics engine. Since 2014, the development continued at https://github.com/RigsOfRods/rigs-of-rods UPDATE: 10/30/2016: removed opencandy installers, replaced with zip files.
WW2 U-boat simulation
SDL/OpenGL based WW2 german submarine 3d simulation, multilanguage support, multiplatform support with advanced sound and graphics. Please visit dangerdeep.sourceforge.net for any news or visit us in #dangerdeep on freenode IRC.
OpenTTD is an open source clone of the Microprose game "Transport Tycoon Deluxe". For more recent versions visit our website: http://www.openttd.org
Rail control simulation game
This project is an attempt to redevelop the rail control simulation game inspired by the closed source projects Gordikon/Softikon/Multikon (http://softikon.wz.cz/) with the stress to: 1) multiplatform support (allowing to run natively not only under Windows but as well under and Linux, eventually Mac and other OS) 2) open source / open to ideas (allowing extensions, maps and add-ons by user community contributions) Read more on Maintainer's blog Česky: Tento projekt je pokus znovu vyvinout simulátor řízení železniční dopravy podobný projektům Gordikon / Softikon / Multikon (http://softikon.wz.cz/) s důrazem na: 1) multiplatformní podporu (umožňit spouštět hru nativně nejen pod Windows, ale i pod a Linux, případně Mac OS a další) 2) open source / komunitě otevřený ekosystém (umožňit rozšiřování příspěvky uživatelských zdrojových kódů, uživatelskými mapami a add-ony) Více pod Maintainer's blog
Multiplayer tactic action game with something of RPG for 20 - 40 players, space game, battles, digging the ore, creating you own ship, 3 Sides (Red, Blue and Anarchists + alone pirates ) the average time of playing one game is 2 hours.
A city simulation game, a polished version of the classic LinCity game. In the game, you are required to build and maintain a city. You can win the game either by building a sustainable economy or by evacuating all citizens with spaceships.
In Open Czech Soccer Manager you can manage your own soccer club in 1st or 2nd Czech Soccer league.
A classical life simulation game (with erotical flavour) as you know from MS Windows. Unfortunately, it runs only in text-mode, but maybe it will change some day. :-)
Home of Pax Imperialis MMORPG and others projects as Defender of Mars, CsIndex, Wox, ...
JiM is simulator Fruit-Machine or simulator One-Bandit-Machine. He can change him "face", help Skins. Skin define all cilinder, buttons, displays, lights,.. and theirs bitmaps, xy-coordination and theirs configurations.
ltrain is intended to be an open source, client-server, multiplatform, 3D environment for managing railroads and trains and driving consists with availability to create own content.