We use GNU Unifont in Solvespace for the text window/property browser. It's built right into the executable. This turned out to be amazingly useful. Some people have CJK stuff in their designs and it "just works" on all platforms. I was also looking into hole annotations in CAD and was pleased to see the symbols for counter-bore and counter-sink are both already there in unifont.
You can see unifont in the experimental web version here: https://cad.apps.dgramop.xyz/