I snuck the announcement for this into another post, but the project has advanced a bit since then so I thought it'd be kosher to call attention to it again. Koan is a package for Sublime Text 3 under Mac OS X only that allows you to add OpenMeta tags and ratings to your files. You can then search within a project for tags and list files in order by rating, and of course use the data in Spotlight and the Finder's Smart Folders. Still sort of in its infancy, but much farther along than it was. The Github repository lives here: https://github.com/phyllisstein/Koan. Enjoy!