Shiftit - fikovnik has 62 repositories available. Follow their code on GitHub.
DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
GridMove - GridMove - A window management tool that can quickly arrange your windows into desktop grids.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
Spectacle App - Move and resize windows with ease.
Mizage Divvy - Divvy is an entirely new way of managing your workspace.