WadAuthor was my tool of choise for years (after some unhappy usage of DoomCAD). It possessed sleek GUI, all essential feats and great texture browser that I miss nowadays... It seems someone needs a session of retroediting.
Great, thanx for help!
I write simple scripts for ZDoom once in a while, no problem. Anyway there are many resources and sources on the net. My question about UDMF is because of my inborn laziness and extreme excitement for the new map format ))