Recommended in /req/, this little Greasemonkey script will add a collapsible navigation menu on every board and thread page. This is intended for people who don't like to use the frame for navigation.
Distributed on a "works for me" basis. I only know enough Javascript to do small hacks like this so I won't add other features myself. Use this thread to report issues or success.
I don't usually care for greasemonkey shit, but I'll probably end up using it. Thanks.