Cinematique Instruments has released Geiger Counter - the April edition of their Free Instruments Series Klang for Kontakt.
They say about it:
Bits, glitches and noises are always a nice rhythmic addition, if they are not enough on their own. So we reactivated our 'former' Geiger Counter, improved the sound and put it into the new KLANG format. Check it out.
Full version of Kontakt is required.