Blue Monkey
Archon Without Portfolio
Was gonna toot the horn for Quintillus' Editor but Civinator beat me to it. Awesome tool. Can either build maps from scratch in it or input a graphics file & let it convert to a map. To expand and simplify on something he mentioned - you can do custom maps of any dimensions in Quintillus' editor as long as you stay under the limit.
To the contrary. The ones who know it best - like Civinator - are here and still working at stuff.genius! Older generation that knew how to do this has moved on.