notesPageLinkFix.user.js is the only script that lives here, it's purpose is to make Side-by-Side Notes work propperly. Don't get one without the other.
The other script which also only lives here is artistsGalleryCategories.user.js - a script which adds links to the artist's gallery categories (currently the category links point to all of deviantart). I've updated it since the last version, now there's an icon you can click to toggle between deviantart links and the artist's gallery links. See a preview here.
If you're looking for more ways to enhance deviantart, check out the mozilla account on deviantart - or the one man army dancewiththesky's suite of extensions and scripts - 'deviantEXPERIENCE'