If you are willing to put some time in configuring your desktop, Slate [1] should do the trick for you.
If delving into yet another application-specific configuration language does't thrill you, then Magnet [2] gives you the baseline i3 functionality out of the box. It only provides shortcuts that allow you to arrange your windows similar with i3. It will not arrange your windows automatically, and its only configuration is changing the shortcuts to your liking.
[1] https://github.com/jigish/slate
[2] https://magnet.crowdcafe.com/
