Excel spreadsheets that use data from VCDS (thanks to firstname.lastname@example.org ).
All sorts of AudiWorld threads about diagnostics.
Paul Waterloo's AudiPages Audi A8 Transmission Coding Page
Transmission recoding for sportier performance.
The "Butt Dyno"
How to calculate wheel horsepower and torque from
acceleration and deceleration data.
Shiftpoints Analysis Spreadsheet
How to determine shiftpoints for optimal acceleration.
Freeware screen printing utility
A great thread on using VAG-COM to permanently alter
Audi Allroad suspension height. This is also known as the 402 Mod.