I found out this is really cool.. love the features. its all there for shopping online business from cart, shipping, invoice, payment and even report..
PrestaShop is actually a professinal e-Commerce Shopping cart software that u can download and use for free.
free download here http://www.prestashop.com/en/downloads/
and for free theme, its quite hard to find. found a few hopefully can find more.. coz this thing really rock.. love it.. download theme here http://presta-template.com/
this is one of awesome example of prestashop: http://themes.dapurpixel.com/rumahbatik/