13 free GIS software progams
Excellent article regarding which GIS open source (freeware) is the best out of 13 choices.
http://gisgeography.com/free-gis-software/
I will try out QGIS. You can download it here at: http://www.qgis.org/en/site/
Update! 02-20-2017
Absolutely love QGIS, I mainly downloaded it to be able to review, edit and gather GIS info.
More to come on how to use this great GIS viewer.
11-12-20 I am currently using QGIS3. The only plug-ins that have given me a bit of an issue have been because I needed to correctly get an authorization from Google's Earthengine API.
Look for my new post regarding how to add a World WMS service plugin called Quickmap services on QGIS. Some of these servers have vast data from certain agencies such as: USGS
Other additional plugins are Google Earth Engine, QAD(QAD allows easy CAD like drafting of lines and polygons)