Pirahã, a hunter-gatherer tribe numbering around 700 lives along the Maici River in the Amazon Forest of North-western Brazil. This tribe speaks Piraha Language
Quipu, also known as Khipu or Talking Knots, were devices used in the Inca Empire to count, keep census records, etc.
Quipu The Talking Knots – 1st Millenium AD
Silbo Gomero is the language spoken on the island of La Gomera, in the Canary Islands of Spain, and is made entirely from whistled sounds.
Silbo Gomero: A Language That Consists Entirely Of Whistling