aheadWorks -
AJAX Cart Pro
The module makes Magento cart UI absolutely customer friendly by means of AJAX. Fully customazible from admin panel.
Progress animation
Cart animation
AJAX activity indicator
“Show confirmation” dialog
Customizable confirmation block
Ability to preview the confirmation block after customization
All native Magento product types support
Ability to specify quantity for products with options in pop-up window
Magento AJAX Cart Pro uses current layout of the store
Support of all product types in wishlist
Shopping cart update and clearance without page reloading

The extension is compatible with the following Magento extensions by aheadWorks:

Checkout Promo
Featured Products 3
Points & Rewards