Yahoo Developer Network has a free CSS Grid builder for easily constructing fully compliant CSS grids with flexibility of content ordering specifically designed for improving search engine optimization (SEO).

Dynamic Drive has a free library of CSS widget resources to make your site beautiful. There are animated horizontal tabs, bullet lists, buttons, menus and pagination links.

These high quality Flash templates can’t be beat for ROI. They are completely free but look like something you’ve spent thousands on.

These free Flash, Flex and After Effects Training Tutorials are fairly advanced. They are in H.264 format and several are on the Flash 10 Beta player. The site is maintained by Lee Brimelow, Platform Evangelist at Adobe focusing on the Flash, Flex, and AIR developer communities.

jQuery is a library of Javascript effects and functions for use on websites. It is much easier to program Ajax interactions using jQuery instead of straight JavaScript. There are tons of widgets like Accordion controls, Date Pickers, Table Sorters, and more. It’s very lightweight. There’s a Dreamweaver Extension for the jQuery API that works with Dreamweaver 8 through CS3.

This 3 Column CSS layout is the best I’ve seen so far. I’m definitely going to use it.