QGIS Quantum GIS/ Tutorial
For those looking to learn GIS or need a system without spending the big dollars, QGIS is a good alternative to propriety systems. It has become one of the most used open-source.
Below are three introductory tutorials with data from Mango Maps. I have never used Mango Maps (http://mangomap.com/), They give free sign up where one can create online web GIS maps. If anyone has experience with Mango Maps I would be interested to know how you found it