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SuperTuxKart is a free 3D kart racing game; we want to make the game fun more than we want to make it realistic. You can play with up to 4 friends on one PC, racing against each other or just try to beat the computer (a network multiplayer feature is planned).

TORCS, The Open Racing Car Simulator is a highly portable multi platform car racing simulation. It is used as ordinary car racing game, as AI racing game and as research platform. It runs on Linux (x86, AMD64 and PPC), FreeBSD, OpenSolaris, MacOSX and Windows.

Stunt Rally is a racing game with rally style of driving, mostly on gravel.

Speed Dreams is a 3d cross-platform, open source motorsport simulation and racing game. It is released under the GNU General Public License (GPL).

Trigger Rally is a fast-paced single-player racing game for Linux and Windows.

Swing Racers is a 3D racing game with unique controls - swing your car around the house with a rubber band - the further you pull, the faster you go but the harder it becomes! Truly addictive and unique with NO IN-APP PURCHASES, Swing Racers is a game for all ages.

Race against players worldwide in a super fast and smashy driving experience. Features a fast and intuitive steering system perfectly suited to touch screens plus both single-player career modes and multiplayer.

Gear.Club is a realistic driving experience, with fully simulated engines, powertrains, suspensions and aerodynamics, offering a full range of customizable exotic cars and gorgeous HD visuals.

VDrift is a cross-platform, open source driving simulation made with drift racing in mind. The driving physics engine was recently re-written from scratch but was inspired and owes much to the Vamos physics engine. It is released under the GNU General Public License (GPL) v3. It is currently available for Linux, FreeBSD, Mac OS X and Windows.

GeneRally is a freeware racing game originally developed by brothers Hannu and Jukka Räbinä from Finland. Although it features a 3D graphics engine, GeneRally has a top-down perspective, where you can see all the cars (which is perfect for multiplayer races). Its art design calls to mind older arcade racing games such as Super Sprint and Slicks 'N' Slide. PCGamer, in an issue about free PC games, described it as "A minimalist Micro Machines".The game and its systemUp to six cars (either human or computer-controlled by AI) can race at the same time on a track. The game is quite easy to learn because the game physics are quite forgiving if you happen to lose control of the car. The game offers three game modes - time trial mode (player attacks best lap of a track; option of ghost car is available), race mode (against next 1-5 human or artificial opponents) and championship mode (season of several races). No matter on simple appearance, the game offers a basic damage model and even tire wear and fuel consumption causing necessity of pit-stops during the race - rare options in genre of arcade racing games including commercial titles. All settings of game are fully customizable (including details like separate adjustable AI level of every single AI opponent or pointing system of held championship).MultiplayerGeneRally does not support online or LAN play. However, up to 6 human players can play around one computer using same keyboard or keyboard combined with other devices like joystick or gamepad. »