I guess I should make 1 asap ;P
I'm using tests like..
Evilmike's Evil Test (Jazzspaz.j2l) (Made by EvilMike)
Platform Test V1.39 (anotherattempt2.j2l) (Made by EvilMike)
Special Test (xlmstestv6.j2l) (Made by Yasco)
Windy Tests 3 (wind3.j2l) (Made by Violet)
Windy Tests 4 (wind4.j2l) (Made by Violet)

Not the easiest tests, also no Wind Meisters. Those are a little easy in general ;P
There will be 1 more test added. Its almost finished. I cant give any more info about it yet ;(
Also, you will be able to download the tests asap on the site.

Jam tried joining, but failed so far ;p


And err, if I misunderstood you.. A collection of ALL tests? Hmm, that would take some time. =P
I'm not sure if I can get all tests together. =O