Libsass Compass Vertical Rhythm
This is a port of Compass vertical rhythm functionality without the dependency on Compass or Ruby Sass.
It's pretty much complete. Only caveat is that IE6 support isn't enabled with
Compass' browser support functionality. Instead, you can set
true if you want that.
Instructions assume you're using NPM. You can use bower though if you like.
$ npm install --save libsass-compass-vertical-rhythm
You can follow the directions in the Compass docs from there.