I was thinking about that two days ago. In Europe, ST was THE computer who make the Atari brand knows, in Europe, it was mainly by demo, in USA it was better by games, especially with 8 bit consoles.
(Juste notice, it was only a personnal reflexion)
In europe, a lot of crew was born because demomaking is good for you the list of all Atari ST democrews is too long, i don't want to list them.
Jagware is mainly constitued by demomakers. Why ? 3 reasons i think, the Jaguar is an Atari machine, the Jag got a 68000 and coding on a Jag is exactly like coding a demo on an ST : no operating system, everything done by hand.
In 'Demoland', Defjam is a coder of a crew called Checkpoint, a 'fuckin rockin try to beat dis demo' crew. Have a look on their productions : http://www.pouet.net/groups.php?which=431
They start to code on a Jag, look here : http://www.pouet.net/prod.php?which=63929