DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
Witch - Welcome to the world of W. i. t. c. h.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
Hyperswitch - HyperSwitch provides a compelling alternative to HyperDock for keyboard junkies. What's New
Mizage Divvy - Divvy is an entirely new way of managing your workspace.
Contexts - Switch between application windows effortlessly — with Fast Search, a better Command-Tab, a Sidebar or even a quick gesture. Free trial available.