Here are a few links — many of these are small non-governmental organizations (NGOs) doing interesting work in Mali. Of course, there are many, many more. Nearly all of the large international development NGOs — Save the Children, Oxfam, PLAN International, etc. — have a presence in Mali. You can find a long list of these at the Directory of Development Organizations, www.devdir.org.
Friends of Mali, set up by Peace Corps alumni at least twice over the years, is unfortunately in hibernation right now, but the website is still up.
SF-Africa, Bay Area African music and culture
Mother Tongue Editions, based in Boston, publishes books in African languages including Bambara.
CC Development Aid, a small NGO from Catalan, Spain with activities around Hombori in northern Mali.