A pic of the original box of Stunts. Looks great! ZAKSTUNTS 2015:

Stunts - ZakStunts 2016 edition
This is the official package for racing on ZakStunts in 2016. Includes Broderbund 1.1 version of Stunts, 5 additional cars which you may also race with in the competition (Ferrari F40, Lotus Esprit Turbo, Melange XGT-88, Nissan Skyline, Porsche 911 Turbo), all previous ZakStunts tracks and winning replays and the most useful tools. (TrackBlaster, RPLinfo)
Start the game with stunts_k.exe!

ZakStunts 2016 official car pack - Included in Stunts - ZakStunts 2015 edition
This archive includes the three official additional cars (Ferrari F40, Lotus Esprit Turbo, Melange XGT-88, Nissan Skyline, Porsche 911 Turbo) available for use az ZakStunts in 2015. If you want to maintain your previous Stunts install, just copy these files into that directory.

COLLECTIONS:

Stunts Competition Archive 2015
This is the updated competition archive, containing all known Stunts competition tracks available until the end of 2015: 807 tracks! You can also access a huge selection of winner's replays almost for all included tracks, from which you can learn, and be the best racer. Simply extract the zip file into your Stunts directory.
Many thanks for Duplode and Krys Toff for their help collecting and maintaining all these stuff!

Stunts Competition Archive 2005 Boot CD
The image is awfully deprecated but I still keep it here, someone might need it:
Having trouble running Stunts? This is a boot CD image with Stunts included. What's more, a huge collection of competition tracks with winning replays (until mid-2005, 22 competitions, 324 tracks) is also on the disc along with the winner's replays. Burn this image, boot and play!
(Note: you can't save replays or tracks onto the CD! :))

NON-COMPETITION TRACKS:

Zak McKracken`s Track Pack (1.2MB)
Lots of tracks (more than 2500!!!) colected from the net and from my friends, categorized by letters. Doesn`t include highscores or competition tracks.

UNOFFICIAL ADD-ONS & MODS:

Cheat cars (190k)
Simply copy these files to your stunts directory, and you`ll have some new cars, which are fast as hell, and even stop in a second. Unfortunately they look the same as the old cars, and of course no racing with these allowed, until not specially told. :)
For custom (non-cheat) cars which are also used in ZakStunts see the official ZakStunts car pack above, or the Southern Cross Stunts Trohpy website!

Zapper's engine sounds (3k)
This replaces stunts's engine sounds with much better ones. Download it and read the readme. Many-many thanks fly to Zapper.

Zapper's car pack (261k)
This adds several cars to your stunts. They are the same ones you had until now, but they are tuned/detuned to match the original cars, they were modeled from. Highly recommended to use together with Zapper's engine sound pack, and also forbidden to use them in the competition until not told any other way. Again a big bunch of thanks to Zapper. :)

3RD-PARTY UTILITES:

Bliss
A modern editor developed by Cas, with mouse support and a huge number of features. Runs on Windows and DOS/Dosbox. Get this one!

Nailwood Company`s Track Blaster (120k)
The historical external track editor for Stunts, and a very good one. DOS/DosBox only.

Nailwood Company`s Car Blaster (100k)
With this utility you can edit any parameter of a car, but beware, it`s not easy to change for example the gear ratios, so I recommend thi one for experts only. And do not try to tune up your cars, I`ll know it.

Nailwood Company`s Score Blaster (100k)
It`s not so useful as the other two, but if you mistyped your name in a hi-score chart, you can correct it with this. Also you can merge two highscore files.