I think Asmodeus Lore probably set this up after reading the ongoing discussion in another forum, which he mentioned should be moved. Anyway, it lists MapTool and some other alternatives. He doesn't really do MT much justice in his descriptions, but maybe he's just being laconic, doing the same to all the programs.
http://forums.gleemax.com/showthread.php?t=1089445
New sticky thread on WotC board
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