More
Nixie clocks
Nixieclock.net
GPS nixie clock
Numechron
Nixiechron
Other clock kits
GEEK & FLW clocks
Nixietube.com
Electricstuff.uk
Cathode corner
TubeHobby
Virtual Clocks
This desktop nixie clock will sync itself to you computer's internal clock and give accurate time.
Download
Then... sync your computer to the Atomic clock for the most accurate virtual nixie clock possible.
Worldtimeserver
Another interesting one:
Industrious Clock