The CSSTidy package for SublimeText 2 works great for toggling between different CSS formats, but none of the default options output CSS consistent with the Drupal CSS coding standards with selectors, braces and properties indented and formatted like so:
selector {
property: value;
}
CSSTidy allows you to add your own templates, but the documentation is sparse, then there's the matter of the Sublime Text 2 integration. If I hadn't been deeply procrastinating, I would not have had th patience to figure it all out. Here's what to do: