|If it interests anyone, I've resurrected sikkpin's branch of QuakeEd3 from about ten years ago (because I actually still use it...), both to avoid actually mapping and as an exercise in taking very old code and making it worse.
Changelist, light documentation, and source are included. Compilers and wads are not, because you already have those. Windows only.
[ http://lunaran.com/files/quakeed3.2.38.zip ]