PyRadMon
Automated reporting of Geiger Muller counter readings to RadMon.org
.... Or, if you do not believe that a nuclear bomb is likely, what about all the Chernobyl-style Soviet-era nuclear power stations still in service? The point is: let us work together as free people to jointly report and track radiation levels around the globe. Information is power--and more importantly, information can save lives.
This project is known to work on Raspberry Pi and various Linux distributions.
Both PyRadMon and RadMon.org are completely free, though donations are always appreciated.