Tears for Fears' original was, of course, one of the best #1s of the 1980s.
Its 10 minute, extended version is worth listening to at least once just to hear all the synth layers separately.
The Bad Plus's jazz trio arrangement is lovely (I'm not sure why these guys get sneered at).
Clare & The Reasons' chamber pop/torch reworking (live on The Culture Show) is pure seduction.
Lorde's grim reimagining (which sounds like it's a good fit for The Hunger Games Part 2) initially struck me as too mannered, but has grown on me these past few days.
Glee, as is its wont, used the song as an anthem of perseverance and (gay) self-affirmation. Anything I've missed?