Drome Racers is described as 'futuristic combat racing game based on the LEGO (Drome) Racers line of construction toys from 2002'. There are three games similar to Drome Racers for a variety of platforms, including Windows, Android, Linux, Mac and OpenSolaris. The best alternative is SuperTuxKart, which is both free and Open Source. Other Drome Racers like games are Lego Racers 2 (Paid) and Pixel Wheels (Free, Open Source).
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).