WinAPRS was the first APRS application to run under Windows instead of DOS. WinAPRS, MacAPRS and X-APRS are the same code base for the varioous operating systems.
The home page for WinAPRS is http://www.winaprs.org
WinAPRS and MacAPRS support many map formats including the original dosAPRS maps, the original MacWinAPRS maps and TIGER maps from the US Census Bureau. The TIGER maps are very detailed and are free for downloading.