I have two that I am very fond of - one is Specialisterne, for the work they do to promote autism hiring. The other is Music for Autism, because of the work they do to give great entertainment in a safe space for kids with autism and their families.
Specialisterne was founded by Thorkil Sonne. After 15 years
in the IT industry he wanted to do something for talented autistic
children like his son. He recognized that for each of the perceived
disabilities, there was a corresponding ability that could be used.
Music for Autism holds monthly concerns in several cities,
just for kids with autism and their families. I've volunteered at two
concerts thus far, and will do a third this month on the 22nd. It's a
lot of fun to see the kids just enjoying music, making noise, dancing
around and having fun without anyone judging them or their parents. The
concert usually has three phase - one where the band just plays, one in
which the kids get to conduct, and the last phase is the best - they all
get assorted percussion instruments and get to play along with the
beat.