There are many undiscovered fantastic examples of simple technical innovations that improve well being of the very poor.
You should contact & partner with Honey Bee Network in India (link: http://nif.org.in/technology-catalogue ). They share resource catalogue regarding simple and cost effective solution for developing countries.
This presentation intended for Africa is a hidden gem !!! http://nif.org.in/dwn_files/africa%20calling.pdf
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