Microsoft Font Validator - A tool that evaluates how closely a TrueType or OpenType font adheres to the current font format...
DWGFREE - DWGFREE is an online platform that comes with a comprehensive collection of CAD blocks that can be downloaded without the need for registration.
FontForge - Free (libre) font editor for Windows, Mac OS X and GNU+Linux
CADMAPPER - Instant CAD files for any location on earth
Apple Font Tool Suite - A suite of tools for working with font files.
MAPACAD - MAPACAD is an online website that is providing leverage to designers and architectures to have the ability to download CAD map cities that can be directly used in their projects.