Shiftit
Open Source
ShiftIt is an application for OSX that allows you to quickly manipulate window position and size using keyboard shortcuts.
Preme for Windows
Free
Preme for Windows speeds up your window switching.
Cinch
Commercial
Cinch gives you simple, mouse-driven window management by defining the left, right, and top edges of your screen as 'hot zones'.
BetterSnapTool
Commercial
BetterSnapTool allows you to easily manage your window positions and sizes by either dragging them to one of the screen's corners.
Moom
Commercial
Moom allows you to easily move and zoom windows.
MaxTo
Commercial
MaxTo is a small Windows program that divides your monitors into regions.
AquaSnap
Free Personal
AquaSnap is a powerful window manager that helps you arrange and organize multiple applications on your desktop with minimum effort.
altdrag
Open Source
altdrag is a simple tool to easily drag windows when pressing the alt key.
GridMove
Free Personal
GridMove is a window management tool that can quickly arrange your windows into desktop grids.
HyperDock
Commercial
HyperDock for Mac lets you take a quick look at the windows you have open in each program when you hover over icons in the Dock.
SizeUp
Commercial
SizeUp allows you to quickly resize and position your windows with keyboard shortcuts or a handy menu bar icon.
Compare Divvy with alternatives
Compare Preme for Windows and Divvy and decide which is most suitable for you.
Compare BetterSnapTool and Divvy and decide which is most suitable for you.