ContentHover is a small jQuery plugin that helps you show some hidden content on top of an element when the mouse hovers over it. There are options to chose how your hover effect would appear, like fade in or slide in from any direction, you can change the opacity of the overlay etc.
A really nice tutorial can be found over at Codrops about CSS3 buttons and the use of pseudo-elements. Don’t forget to check the demos where you can find 5 different button styles.
A really useful jQuery script if you want to replace the default form dropdowns. Very easy to customize it as well. As the author states:
“Creating custom dropdowns is usually a tedious process that requires a ton of extra setup time. Oftentimes lacking conveniences that native dropdowns have such as keyboard navigation. DropKick removes the tedium and lets you focus on making s@#t look good.”
The Harvest team brings us something really cool, a plug-in for jQuery and Mootools that improves the overall look and UX of your select boxes.
It comes with options for auto-filtering results, painless multi-select and much more.