I'll select one person for #followfriday: @mairin
Máirín is a free software advocate and a person pushing for making free software to be beautiful and usable. She's inspired a lot of my work on where I think FOSS needs to go in order to be used by real humans.
Her work on teaching digital illustration with Inkscape to girl scouts quite a few years ago also is one of the things that inspired @mlemweb and I's recent workshops on Racket and Scribble!