WindowSnap

Put windows on any edge with the arrow keys.

Browser on the left, Word on the right, without touching the mouse.

Each arrow puts the front window in the half on that side, wherever it was before. From the left half, ⇧↑ then makes it the top-left quarter.

  • Slides into place in 340 ms, and you can set that down to zero

The app has a short tutorial for this. In the settings window, click Try it on the spoon’s page or press Command 5 for Tutorials.