I've been working on a code library that is aimed at generating 2D font geometry suitable for milling and cutting processes. The first version of this new plug-in can be downloaded from our servers, it requires the latest Rhino5 Service Release.
Two documents are also available, one acts as the help file for the plugin, the other is the *.fabfont file specification.
File format specification
This is the first release of this new project, there's some stuff that doesn't work well yet (most notably path optimisation). There's also very few tools for layout and typesetting. Mostly, we're trying to figure out whether we've missed important features or whether the existing features fall short.
The plug-in ships with a default font called AtoB, the source geometry for this font is open source and also available for download.