Since I was already bringing up the past pleasures... I'll archive this one here as welll... This script is very nice to have when you are on a loooong web page (like a spec or something) and need a Table of Contents. Look at the following illustration for an example (from the CSS1 spec):
Just drag this link to your Bookmarks Toolbar, and click it when you need a TOC. Quite effective (just click it to see the effect on the current page...):
A userscript/Greasemonkey version of the script is available at userscripts.org, but I actually find the Bookmarklet more attractive myself.
Oh, and it only works with Firefox. Feel free to create your own version for IE, I'll be happy to link to it from here...

I prefer the ability to put Table of Contents in the sidebar with Alt+O (letter o) doesn't get in the way and easily toggled in or out. If you change a page the TOC changes with it. Each line is a link as in other TOC things.
Document Map :: Firefox Add-ons
https://addons.mozilla.org/firefox/475
Runs in any version of Firefox, just turn off compatibility test.
Posted by: David McRitchie | 12 February 2009 at 17:27