I've been playing around with jKit.com for a bit now, and I think it's great. It allows you to easily add a whole bunch of jQuery features to your site; sorting, slide shows, carousels, tooltips etc.
The support forum is young, but the Fredi the author is very helpful.
If you want it to do something more, then it can get hard - but for basic implementation and a bunch of tools - it's perfect.
ie. I created http://www.saintlucy.com.au very simply. It contains page sliding, tabs, carousel, slide-show.
Just a quick note. The correct URL is http://jquery-kit.com
Northern Penguin Technologies
"Any sufficiently advanced technology
is indistinguishable from magic."
........Arthur C. Clarke
Mmm. Sorry about that. Did you like it?