@Jesse I've considered doing that, but, personally, prefer the bookmarklet versions, as I want them available on other websites and don't want a userscript or extension adding them into every page on every site for multiple reasons. Given that
I've licensed all the bookmarklets that I've posted here under the MIT license, it's perfectly legitimate for you to create what you've described, if you want to. Note: I've updated all of them to more fully comply with the requirements of the CC BY-SA 3.0 license under which Tim's code was posted.