I'm not sure if some one made this already or not..But someone needs to make alist of them!
/hug - Makes your arms point out like your going to hug someone.
/zombie - same as hug.
/fetch(username) - Brings that user to you.
/find(username) - brings you to user.
/brickcount - Tells you the brick count.
/respawnvehicles - Resets all the vehicles.
/resetvehicles - same as above.
/light - Turns your light on.
/alarm - ARRR!!
/love - <3 <3 <3
/hate - >:(
/wtf - ?!!?!
/confusion - not sure
/timescale 0.0 - Replace the 0.0 with 0.5, 1, or 2 to get a time effect.
/spy (name) - spys on the player
/colortest - a color test
/test - spawns a ghost brick (if you do it 2 times you cant get rid of the last ghost brick
/test2 - same as /test but with a diffent ghost brick
Post the ones you know so I can expand on this list!