IronWolf
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Coincidentally, NewbieDM was talking about Gametable (OSU-gt) over at his blog yesterday, and we were discussing my thoughts about what MapTool lacked in the comments section. Ismael_DM pointed out that he had used the object layer in MapTool to do what I had loved about Gametable. It takes an extra step or two to do this in MapTool, but it's totally worth it.
I have used some of the maptools means of creating maps. I've fairly easily been able to create a cliffside scene I needed and multi-chambered underground sewer thing. They seemed to work well and came out looking pretty reasonable.
Here are a couple of links to tutorials around using layers, images and the draw tool in maptools that can be useful:
Layers
Images
Drawing Tools
ANYTHING for the Mac. More specifically, a character generator for use on a Mac.
PC Gen works on the Mac and supports "d20 based Game Systems including D&D (3E, 3.5E, 4E), d20 Modern, Pathfinder, d20 Modern".