A friend of mine is a blind developer. He built his own screenreader for Android ( https://play.google.com/store/apps/details?id=info.spielproj... ), because he was unhappy with the existing options. I haven't yet gotten over being amazed, but I always knew he was really bright, so I should just get over assuming not having sight would prevent him from being an effective developer.

He has ambitions to do hardware hacking, but has been thwarted by difficulties with identifying parts (i.e. resistors are color-coded), among other things. I've been meaning to sit down with him sometime and work on something.