SimpleUSA Project & Dataset is a comprehensive data set of US state boundaries, cities, roadways, waterways, and more including a full geocoding and street routing database, available for free download below. The SimpleUSA project is a free project to use with the Simple GIS Client application.
Simple Map Viewer application is a free application allowing users to view and query portable map documents published from the Simple GIS Collaborate plugin for Simple GIS Client. Portable map documents provide a convenient mechanism to share interactive maps with colleagues and clients. For more information about the free Simple Map Viewer application click here
The Simple GIS Server Admin Plugin is a free plugin extension for Simple GIS Client that allows users to administer and publish data to their remote Simple GIS Server instance from within their Simple GIS Client application. This plugin requires Simple GIS Client Version 12.05 or later and Simple GIS Server version 4.0 or later. You can read more about this plugin from this link ... Simple GIS Client Plugins.
Listed below are links to several websites where you can find free GIS data. This is by no means an exhaustive list and as you explore, you will likely find that there are quite a few free GIS data sources available off of the internet. We hope you find these links useful.