Here's one I like and have given money to: Compatible Technology International:

CTI helps poor families process their harvested crops into nutritious food. Our goal is to help people in developing countries make safe food and water for themselves, their families, and to sell in the local market.

We strive to select or create technologies that are safe, affordable, respect the environment, require little or no fuel and electricity, and are compatible with the culture of the users. Most of our technologies are sized for small villages, extended families, coops, or very small commercial users.

It's a very small organization. I became acquainted with one of the staff members when they occupied space on the campus of Hamline University, where I used to work.