I originally didn't post a link because I haven't really worked with them yet, meaning haven't done any projects through them so can't say whether or not they are a worthwhile organization. (E.g. when I recommend a book or a class, I'll have personally read it or in a few cases have enough trusted people endorse it to me such that I feel comfortable on the basis of their recommendations; that's not the case here.) However since people have asked the group is called
Taproot; there are probably other similar groups.
--Mark