Yes - I use Spectacle constantly. I looked for years for a good tiling window manager - at least once every three-four months I would go searching the web, and wondering "Why has nobody built a decent tiling window manager."

Spectacle does 60% of what I want, and the keyboard shortcuts for it are in my finger DNA. Works particularly well on a 13" Macbook Air. But I'm still holding out for a proper tiling window manager - one of these days...

I think "slate" is a bit more powerful than spectacleapp. However, the experience is far away from something like Xmonad and i3wm on Linux.

https://github.com/jigish/slate