--> Commander Keen Custom Files -- So far these files are available for download:

kmolevels.zip, a set of 16 custom levels for Commander Keen 1.
pleit.zip, the sequel to my first set of levels. These are also for Commander Keen 1.
My final level pak for Commander Keen 1. No punches pulled on this one!!

These level-paks were made with KeenMakeOver 1.0 by Geoff Sims and Peder Johnson, and are available for download there as well. Maybe more will be coming soon!