Speed Haste

Speed Haste is a 3D racing video game for DOS. It includes both Formula One and stock cars. The player can compete in championship mode, covering all circuits with an increasing difficulty. The multiplayer mode offers split-screen racing or IPX-based sessions with up to 4 players.

It was released in Nort America by WizardWork Group, under the name "Circuit Racer", and in Holland by Multimedia International BV (named Grand Prix Speed)

Open Source
In 2012, the game's developer, Javier Arevalo Baeza, released the C source code (minus some commercial libraries) as public-domain software on GitHub.