Anything in particular about Reddit Enhancement Suite you're after? (I'm not overly familiar with RES.) For HN, I use StyleBot and Tom Moor's HackerNew Chrome extension: https://chrome.google.com/webstore/detail/hackernew/lgoghlnd...
I wrote some Greasemonkey scripts for Firefox. They are pretty basic and a bit buggy, but work well enough:
I've made two chrome extensions (the latest one just a couple of days ago (went by unnoticed :()):
https://chrome.google.com/webstore/detail/hn-favourite-users...
https://chrome.google.com/webstore/detail/hn-unread-comments...