Trigger (automatization app, for nfc wifi and bluetooth among a few other things)
AirDroid (New one for me but, control phone using desktop. Great for work)
D3LTA (Photo...um...Manipulation (???) app, check it out)
Glitch!,Glitchr and Glitch Camera (Glitch art apps, pretty neat)
SambaDroid
Retroboy (Old School videogame style filters for camera, seriously worth buying)
I have a lot more, but I am trying to keep the list short-ish
