PC Keyboard Controls
W = Move forward
S = Move backward
A = Move left
D = Move right
Space = Jump
Left Mouse = Action button when holding tool (like digging)
Right Mouse = Secondary action button
M = Map
G = Graphs
O = List of players (click on a players name to change reputation)
C = Chat channels
L = Laws/voting
B = Backpack (also where third person button is)
Splitting Items, use shift+left mouse, drag meter, then drag item from splitting popup box to wherever.
Nothing can be deleted from your inventory, make a chest! In future update you can drop stuff, but not yet.