Rectangle - Window management app based on Spectacle, written in Swift.
AquaSnap - Too many windows on your screen? Stop wasting your productivity.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
Mizage Divvy - Divvy is an entirely new way of managing your workspace.
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
Swish - Insanely great window management