[abecedarius]

It'd be really nice to see a site collecting all the problem descriptions over the years. That doesn't exist, does it?

[Jtsummers]

https://www.icfpconference.org/contest.html

Contains a list of links to all the competitions. I don't have time to check at present, but some may be dead links.

[abecedarius]

Thanks! (The logical place, cough.)

[wrsh07]

See "past tasks": https://en.m.wikipedia.org/wiki/ICFP_Programming_Contest