My slate config (https://github.com/jigish/slate)

.slate

# This is the default .slate file.
# If no ~/.slate file exists this is the file that will be used.

config defaultToCurrentScreen true
config nudgePercentOf screenSize
config resizePercentOf screenSize

# Resize in vertical direction, cycle through 1/3, 1/2, 2/3, full, either top or bottom. Up ends in full, Down ends in middle third
bind up:ctrl;alt;cmd      chain   move windowTopLeftX;0               windowSizeX;screenSizeY/3 | move windowTopLeftX;0              windowSizeX;screenSizeY/2 | move windowTopLeftX;0              windowSizeX;screenSizeY*2/3 | move windowTopLeftX;0              windowSizeX;screenSizeY
bind down:ctrl;alt;cmd    chain   move windowTopLeftX;screenSizeY*2/3 windowSizeX;screenSizeY/3 | move windowTopLeftX;screenSizeY/2  windowSizeX;screenSizeY/2 | move windowTopLeftX;screenSizeY/3  windowSizeX;screenSizeY*2/3 | move windowTopLeftX;screenSizeY/3  windowSizeX;screenSizeY/3

# Resize in Horizontal direction, cycle through 1/3, 1/2, 2/3, full, either left or right. Right ends in full, Left ends in middle third
bind left:ctrl;alt;cmd    chain   move 0;windowTopLeftY               screenSizeX/3;windowSizeY | move 0;windowTopLeftY              screenSizeX/2;windowSizeY | move 0;windowTopLeftY             screenSizeX*2/3;windowSizeY | move screenSizeX/3;windowTopLeftY  screenSizeX/3;windowSizeY
bind right:ctrl;alt;cmd   chain   move screenSizeX*2/3;windowTopLeftY screenSizeX/3;windowSizeY | move screenSizeX/2;windowTopLeftY  screenSizeX/2;windowSizeY | move screenSizeX/3;windowTopLeftY screenSizeX*2/3;windowSizeY | move 0;windowTopLeftY              screenSizeX;windowSizeY

bind m:ctrl;alt;cmd       chain    move 0;0 screenSizeX;screenSizeY | move (screenSizeX-1024)/2;(screenSizeY-720)/2 1024;720

bind left:ctrl;cmd        focus left
bind right:ctrl;cmd       focus right
bind up:ctrl;cmd          focus up
bind down:ctrl;cmd        focus down