HERWIG, a general purpose program for simulating QCD effects in lepton-lepton, lepton-hadron and hadron-hadron collisions.
CompHEP, a generator
of event generators at partonic level for all types of elementary particle
collisions.
This site is also mirrored at
Zeuthen.
A similar list was also compiled as part of the Snowmass workshop. Although it is not quite up-to-date, it is obviously a lot more complete than our list at the moment.
Mike Seymour, Event Generators working group, ECFA-DESY workshop for a Linear e+e- Collider