Recently, Michael Detlefsen, one of two individuals who ported Eamon to the Atari ST, has posted two Eamon-related items for the PC to the Internet Archive. Each is an AGT (Adventure Game Toolkit)-authored adventure game, playable on MS-DOS and hence (presumably) Windows. Detlefsen shepherded his Atari port by hosting it on GEnie, writing the single Eamon newsletter, and manually translating several adventures to the platform. However, Detlefsen at some point abandoned Eamon development and embraced the AGT platform.
The first is an expanded version of Evan Hodson's Quest for the Holy Grail, a riff of the Monty Python film. Holy Grail was one of the Eamons Detlefsen ported to the Atari ST; after adopting the AGT platform, he made additional enhancements to the game by adding puzzles, rewriting descriptions, and making further changes. The Misadventure of the Holy Grail, the enhanced version of Quest for the Holy Grail, can be downloaded here.
The second is a port of Detlefsen's aborted Eamon adventure The Star Portal. Detlefsen made a report on his progress in the Atari Eamon newsletter, mentioning that he has "blocked out" sixty rooms for the map, but never completed the Eamon version. After abandoning Eamon and adopting AGT, Detlefsen resumed work on Star Portal, winning an honorable mention in the Second AGT Game Contest. A review can be found here and the game itself can be downloaded here.