I think you'll find dundjinni is the closest. I use it to make maps for my use at the table, larger battle mats and I use the export (JPG) feature to use maps in my PbP game. Be prepared you will probably need to purchase the "Castle-temple-village" add-on, it costs $30. It was well worth it. Total cost $70 (Software on CD (ordered by FLGS [includes both MAC/PC versions] and the add-on). There are many links within their forums to free user created stuff as well.