William Kamkwamba (Electricity-Generating Windmill)
This Malawian inventor is also an author. He became famous after building a windmill to power few electrical appliances at his family home in Masitala using blue gum trees, bicycle parts and materials collected from a local shipyard. Since then he has made a solar-powered water pump that supplies drinking water to his village.
Louis Liebenberg and Lindsay Stevenson (Cybertracker)
These South African inventors invented Cybertracker, a hand-held computer that helps in tracking animals in the field. They connected the unit to a satellite navigation system in 1996. The unit’s graphic interface makes it possible for illiterate people to use it with ease.