A new website called County Health Rankings analyzes public health statistics for each county in the US, creating state-by-state reports of the healthiest counties. The website, a joint project of the Robert Wood Johnson Foundation and the University of Wisconsin Population Health Institute, analyzes healh factors (statistics about disease incidence, tobacco use, etc.) and health outcomes (such as life expectancy) to create county-by-county rankings of each state. These rankings are then mapped for each state, using Flash-based Fusion Maps software (not free/open source) so that users can drill down to access county-level data.
"This program is intended to make working with the Generic Mapping Tools (GMT) easier. iGMT provides a graphical user interface for GMT and is written in the Tcl/Tk computer language. Besides supplying a user friendly way of handling GMT, iGMT comes with built-in support for many different geoscientific data sets, such as topography, gravity, seafloor age, hypocenter catalogs, plate boundary files, hotspot lists, CMT solutions etc."
An interactive mapping tool with a built in datasets.