Google Earth gives you a wealth of imagery and geographic information.
Note: While the software is classified as freeware, it is actually donationware.
Magic Maps is an innovative tool for analyzing time-series data on a map.
Two great packages in one: an instant pro audio toolkit.
RPGMapMakerX (formerly HexMapMaker) is a tool for drawing maps with polygonal grids.
The ReMap logo will be displayed next to the mouse when mouse hover.