Looking for some programs or advice.

[Tea Tree]

I'm making a batman mmorpg using the program BYOND. I have iconned with byond for a while, but I'm trying to find a program that I can draw the program and convert it to byond, I can't use paint or PS, any suggestions? What I really want to do is icon the base icon, the clothes, the buildings, ect ect.

I apologize if this is in the wrong section, I haven't had a lot of time to look around the forum.