These maps may contain spoilers, primarily in the form of revealing locations you are not yet aware of.
Many of these are based on the hand-drawn maps I created as my girlfriend and I played these games. As such, there are almost certainly errors. What information is on the maps is pretty much whatever I bothered to write down. As such, it's typically just locations, no items or anything else.
The IFM files are for the "Interactive Fiction Mapper", which is the best IF mapping solution I've found so far.
Various games produced by Infocom in the 1980s.
Games available from online sources.
The Meteor, The Stone And A Long Glass Of Sherbet: Graham Nelson's diplomatic adventure in the far future of the Zork/Enchanter world. Map (PDF). Source (IFM). Walkthrough (long form with explanations, text). Walkthrough (terse, text).