Lots of scripts, etc. for slideshows, menu effects, tons of stuff. Java, DHTML, CSS, etc.
I use some of them with our company's website (built with FrontPage 2003). Free to use, but you have to keep the credits part of the scripts in the code (not visible to the viewers of the website though).
I'm still using FP 2003 on Win 7 Ultimate 32bit.