Stylish CSS3 progress bars
Interactive menu with CSS3 & jQuery
Android Dock Using jQuery & CSS3
Inspired by CSS-Tricks http://css-tricks.com
Border tinkerings
Experimenting with forms.
Text Shadow
Animated Progress Bars
Animated Menu Using CSS Only or CSS and jQuery
Non-working : Twitter Updates : Display Your Twitter Status in a Unique Design
Similar effects could be created purely with CSS.
Look at how CSS gradients, shadows, borders, transitions and transforms can all be combined to create a stylish button.
Drop caps have been around for years in the print industry, but they are still pretty rare on the web.
With the help of some advanced selectors a dropdown menu can be easily created with just CSS.
Does not display the stripping in IE. :(
Password Strength
An easy, multi-level jQuery accordion
No-Library (pure JS), HTML, CSS, JavaScript
Mobile phone icons
Simple textarea character counter with a custom min and max comment length.