Product options with quantity option to add to cart particular item.. also live price changes as per the selected option and quantity.
This extension mostly used for food product to display weight option for item with quantity, so that customer can select weight of that item and input quanity to place order..
Also here we are displaying success message of add to cart at the top of that product without scrolling page at top so that customer don't need to scrol page again to choose another product.

This Extension works on Featured,Special,Latest,Bestseller modules as well as on category, special, search, manufacturer pages and on product page in case of related products.

Demo: