QGIS is a professional GIS application that is built on top of and proud to be itself Free and Open Source Software (FOSS). Create, edit, visualize, analyze and publish geospatial information on Windows, Mac, Linux, BSD (Android coming soon). It's compatible with desktops, server, s in your web browsers and as developer libraries.
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.