Brain child of Bob Basques, Jim Klassen and Dan Little while working for the City of St. Paul, Minnesota, this Free and Open Source Software for Geospatial (FOSS4G) product was recently sanctioned by the world-wide Open Source Geospatial Foundation. Easy to install software that enables your local maps and imagery to be shared online with others. Currently used by hundreds of units of government around the world. It's free and USNG functionality works right out of the box.
TicketsCAD
Founded by Federal communications expert Arnie Shore, TicketsCAD is a free and open source Computer Aided Dispatch system designed for emergency services agencies. The software includes vehicle tracking, cell phone and text integration, and automatic notifications with built-in USNG support. Cross-platform and browser-based, TicketsCAD provides professional dispatch capabilities accessible to agencies of all sizes.
Developed jointly by the Environmental Protection Agency and the National Oceanic and Atmospheric Administration, MARPLOT is the free mapping component of the CAMEO software suite used to plan for and respond to chemical emergencies and HAZMAT incidents. The easy-to-use interface displays ALOHA threat zone estimates, links to CAMEO Data Manager records, and includes enhanced support for U.S. National Grid coordinates.