Flexi Sign&Print ($3,295) and Flexi Designer ($999) also handle one-line fonts, as do some other plotter-control softwares (might be called plotter-pen fonts, engraver’s fonts, technical lettering fonts). Not sure about the software that comes with the craft-cutters, but those might have some options too.
I found a fairly reliable script for AI that produces a one-line font. It only has one style (Ann), it’s missing certain non-letter glyphs, and has no real control over layout (it reads line breaks from the return key, but that’s about it). But it does work for some stuff, and is free.
The script is here, and still mostly works with the current AI CC release (there are occasional bugs).