Tiling window manager for OS X similar to xmonad, written in pure Objective-C.
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Pro It's free and open-source
Amethyst is published under the MIT license making it open-source and id offered completely free. This allows anyone to give the tiling window manger a try, which is great.
Pro Written in pure Objective-C
Using Objective-c allows the window manger to stay fast as well as be compiled fast.
Pro Works with keyboard shortcuts, no mouse needed
By be designed to work closely to how xmonad works Amethyst uses keyboard shortcuts to control the windows being used with no mouse input necessary. This can make for a faster way to control windows one one gets used to using the keyboard for all window controls.