Awesome, filtered top 10^6, removed sites with ads and e-commerce, typed in "enigma machine" and got some great gems:

http://ciphermachines.com/index.html http://enigma.louisedade.co.uk/howitworks.html

If you're interested in Enigma machines and find yourself in Maryland, you can play with one at the NSA museum next to Ft. Meade.

http://enigma.louisedade.co.uk is 3rd result in google search for "enigma machine" though

Looks like the site's having some issues right now. Using some of the search criteria redirects me to https://millionshort.com/500

Several search engines have had issues today, I haven't heard anything about a root cause though.

http://downdetector.com/status/bing

This is terrific, I wanna add this as a ddg bang...

Just filled out ddg's suggestion form to add this as a bang. I'll let you know if it goes live.

This is awesome, never knew about this feature. I may have to give ddg another shot.