There are hundreds of add-on tracks available. Highlights of these included the legendary 22 kilometre Nordschleife, Laguna Seca, Macau, Circuit de la Sarthe (host of the Le Mans 24 Hours), and Bathurst.
Despite its age, GPL has remained a top class sim even in 2008 thanks to a strong community, who collectively have updated the graphics to utilize the current CPU and graphics capabilities and have created loads of add-on tracks of a high quality. Modding teams have managed to create new physics sets, and a 1965 1966 and 1969 variants are now available with many improvements over the original.
David Kaemmer, co-founder of the now-defunct Papyrus, has released iRacing, a new multiplayer-oriented simulation run on a subscription model. Rally fans have a hardcore racing simulator with Richard Burns Rally. Eero Piitulainen, lead physics programmer for Richard Burns Rally, is currently developing a new multi-class online racing simulator called Driver's Republic. A team of enthusiasts from Italy, who used to create modifications for Richard Burns Rally, have started making gRally, a highly realistic rally sim intented to bring realistic rally to new generations, and also open up for modding.A small, 3-man team is developing Live for Speed, which has just announced the third, and final phase of a 3-phase development cycle. Phase 2 brought in many updates, including the first real cars (The BMW Sauber F1 car being included in those), however for Phase 3 the first real-world circuit has been announced - The Rockingham Motor Speedway. The circuit will be laser-scanned for absolute accuracy. Also coming soon is another real-world car - the new VW Scirocco; for which several physics changes have had to be made to ensure a fully accurate simulation.In August 2005, ISI released rFactor, a highly modifiable sim based on their gMotor2 physics engine. Notable for its initial download-only distribution model, rFactor originally released with fictional cars and tracks. ISI's encouragement of the enthusiast mod community has led to an unprecedented number of add-ons, including 800-horsepower-stock cars. Subsequent releases of rFactor featured Formula One cars and recreations of real track layouts under fictitious names. 153554b96e