http://cssjuice.com/16-sortable-table-techniques/

corners using javascript

Tool to convert ascii to hex and unicode.

The online generator to beat all online generators.  This one has a list of them all.  Well, maybe not all, but there are some pretty useful generators listed.

Dynamic site for keeping your website interesting.  Includes effects for mouseovers, clocks, count down timers.  Some of the examples only work in internet explorer.

An ajax idea for using an online signup form that keeps the visitor on the same page.