I've recently released a Windows version of a utility I've been working on called Camoto. My apologies if you've read this announcement before, but there seem to be quite a few people here I haven't seen on other forums so I thought you might still be interested.
Here is my announcement which includes a download link. It's still early stages so there are plenty of bugs, but you might be interested in having a look all the same.
At present, Camoto is able to edit at least some parts of these DOS games:
- Captain Comic
- Catacomb
- Catacomb II
- Cosmo's Cosmic Adventures (incomplete)
- Crystal Caves
- Dangerous Dave
- Dark Ages (no level editing yet)
- Duke Nukem II (early stages)
- Halloween Harry (incomplete)
- Hocus Pocus (incomplete)
- Jill of the Jungle
- Monster Bash (incomplete)
- Rockford
- Secret Agent (no level editing yet)
- Wacky Wheels
- Word Rescue
- Xargon (incomplete)
- Zone 66 (music only, incomplete)