Amethyst is a tiling window manager, mjolnir is an automation tool, which can be configured to be a window manager. Not sure if it can be configured to be a tiling one.

Amethyst is a window manager more like Slate. Mjolnir is an automation app that can do a lot of things, including window management.

Just wrote a basic tiling window manager config based on amethyst: https://github.com/nathankot/dotfiles/blob/master/dotfiles/....

Half-baked, but it's smoother than amethyst for me :)