SINGLE LINE FONT IN LIGHTBURN HOW TO
closed fonts, how to remove double lines in Inkscape. There's a "pro" version which has extra editing capabilities.
The fonts appear similar to Machine Tool or Hershey. A free font pack is available which adds extra fonts. The free version has basic tools to set size, spacing, angle, curve etc. It will generate either a DXF file or G-code toolpath for whatever text you enter.
Single-line fonts (also called engraving fonts, technical lettering fonts, pen plotter fonts) are hugely useful when performing machining or drawing operations. In addition to the Hershey extension, they have an excellent overview of what exactly a single-line font is and how it compares to "outline" fonts. Go and read Evilmadscientist's page on their Hershey text extension for Inkscape. Summary of single-line fonts (10/01/15) What's a single-line font?