Simpler one with _zero_ contact!

https://en.wikipedia.org/wiki/Namaste

A visible nod, like a little bowing, would be enough.

In many countries is common to kiss one, twice or even thrice!

Or even four (in some parts of France at least)

lol http://timesofindia.indiatimes.com/city/hyderabad/Namaste-hy...

Fist bumps > handshakes https://www.health.harvard.edu/blog/fist-bump-better-handsha...

I'm not sure if I can find a direct citation, but Penn & Teller have said that rubbing butts is more sanitary than shaking hands, and that they'd be happy for fans to greet them that way.

If you shake hands with an unsanitary person you can easily sanitise your hand. If you hug an unsanitary person you'll need a shower and a change of clothes.

Plus there's the smell...