3rd party apps and overlays

Crew Chief
Simulates crew chief and spotter voice communications during race.

Also has an optional HUD overlay.

Link

OtterHUD
A HUD overlay

Link

SecondMonitor
Gives live stats on the race.

Link

Raceroom Commander
A Dedicated Server tool that allows you to send chat and other stuff.

Link

Virtual Race Engineer
Does all sort of stuff

Link

Z1 Analyzer
Analyzes a race telemetry.

Link

R2M
Exports to MoTeC.

Link

Z1 Dashboard
Highly customizable HUD overlay.

Link

RacingSimTools
Telemetry analyzer.

Link