Bangladesh -- one makes a relaxed salute with the right hand.

Benin -- young men often snap fingers when shaking hands

Botswana -- people touch hands, like a handshake that doesn't include a grip, just lightly grazing palms and fingers. They ask each other: "How did you wake?" (It's interesting, in our family, we often ask, "How did you sleep?")

Cambodia -- here, one would put your hands together like "praying hands" holding them against your chest. The higher you hold your hands, the more respect you show.

Bhutan -- they ask, "Is your body well?"
...more

In tibet i have heard they greet by touching each others tongue,i may be wrong.

A Kikuyu in Central Kenya, for instance, would commonly hold their right forearm with the left hand, or place the fingers of the left hand lightly on their own forearm, as they shake the hand of the other person. This is common with many peoples in Eastern and Southern Africa.

Maasai
But the Maasai do not grasp hands, but just touch palms, or touch and slide all the way off. An elder (adult) greet a child or teen by placing the palm of the right hand lightly on the head of the younger (one time only, not patting). Older men may greet younger adult women this way also, although the pattern tends to change after the young women is either married or has her first child. This also varies with each village or each of the 10 tribes of the Maasai.

ZIMBABWE .... Men may greet women by kissing their hands;

SWEDEN :Men greet women by tipping their hatIn Tibet, it is a courtesy that when Tibetan people meeting and greeting you, they will put their hands palm to palm near the ches ...more

Http://www.trendhunter.com/slideshow/interact-with-strangers

So many countries
so many different ways to greet

Strange ways
so many lands