Moom - Move your mouse over the green zoom button in any window, and Moom's mouse control overlay will appear (as seen in the above animation).
i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Hammerspoon - This is a tool for powerful automation of OS X.
dwm - dwm is a dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed.
Spectacle App - Move and resize windows with ease.
Xmonad - xmonad is a dynamically tiling X11 window manager that is written and configured in Haskell.