1. CSS Tabs
Here we'll look at using CSS to build a tabbed display. One where the user can click on individual tabs to view different content within the same space.
2. Dock Menu
Check this Dock Menu, it is really cool and I used it in one of my college project website.
3. Star Rating using CSS
Here is the original CSS star rater in all of its goodness.
4. PNG Overlay
Another way to add flare to images (rounds the corners and adds a border and drop shadow).