geoFAX 4.0 v2 - Although this program doesn't really have a modern day application, it would still be possible to setup and use if you happen to have one of the approved modems and a Turbo 232 serial cartridge.  The archive contains two .d64 images, one with the program, the other with a full manual.  Also included in the archive are the .CVT files for each part of the program if you wanted to see how I got it before I converted it to .D64's.

There is a nice review and some addition tips for using the program in Commodore World - Issue 10