http://www.grandprixgames.com/gp3/

GP4:

http://www.grandprixgames.com/

http://www.emacf1.com/rh

Momo Ichigo:
http://www.emacf1.com/momo

Jan Frischkorn:

http://f1design.de
or http://www.emacf1.com/jf [not offical HP]

Bojan Tarticchio:
http://grandprixgamer.com/bolid77/

Bobi's F1-2001 & F1-2002 Site:
http://f12001.m4driving.sm/

Ricardo Lampert's Site:

http://ricardolampert.drivingitalia.net

Add-ons for GRANDPRIX 3:

http://www.multimania.com/oliviergp3 [CLOSED ]

Terence Yaw: [email: terenceyaw@ecsm.com.my]
http://www.nmservices.com.my/gp3 [CLOSED ]

Jouko Saarinen:
http://koti.mbnet.fi/eclipse [CLOSED ]

Perran Truran:
http://www.cum.motorpage.com [CLOSED ]

http://www.smyoung.fsnet.co.uk/gp3edit.htm

GP3Master:

http://grandprix3.gamigo.de/gp3master [CLOSED ]

John's GPx Site:

http://www.grandprix-x.com/

SDI Game Utilities - Home of GPxPatch:
http://www.xs4all.nl/~rsdi/

Marc Aarts racing sim tools:
http://home.wanadoo.nl/marc.aarts/index.html

Carsetreator [by Jon Walton]:

http://carsetcreator.grandprix-x.com/

simmods.com [ex simbin.com]:

http://www.simmods.com

Grand Prix Gamer:

http://www.grandprixgamer.com

GRANDPRIX3.COM:

http://www.grandprix3.com/

GRANDPRIXGAMES.ORG:

http://www.grandprixgames.org

simracingworld.com:

http://www.simracingworld.com/

GPX.IT ( Ex F1GP3.IT):

http://www.gpx.it/

Grandprixoz.net:

http://grandprixoz.net

F1-2002 The Successor [by Dennis Grebe]:

http://f12k2.relaygames.com

Classic Grand Prix:

http://64.41.95.24/ [CLOSED ]

GPxRacer:

http://www.gpxracer.de