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http://www.memo.tv/msaqtplayer/
KEYS
esc - quit
f - toggle 'in Front' mode
s - toggle 'Stretch to fullscreen'
space - toggle play
j, k,l - control playback rate: slowdown (and play backwards) / stop / speed up (and play forwards)
home, end - goto beginning / end
left, right - frame advance back / forward
[ ] - seek backward / forward 1/10th of the movie
pgup, pgdn - goto previous / next chapter
m - toggle Mute
up, down - change volume
Start Programs automatically
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http://www.symonds.id.au/marcopolo/
(Marco polo is no longer being updated, controlplane is a port of marcopolo which is better maintained)
Displayplacer:
https://github.com/jakehilborn/displayplacer
Display placer can resize and rearrange multiple screens in OSX through the command line.