Appster is a powerful WordPress theme for product showcase. It includes a filterable portfolio and featured portfolio posts. The theme comes with 7 custom widgets (latest Tweets, Flickr feed, testimonials, tabbed content panels).
This product showcase template offers 3 skins (light, dark, black & white). The theme is fully responsive so it looks great even on small screen devices. This theme uses many custom shortcodes, such as toggle boxes ideal for FAQ, product/image slider, 4 alerts and callout for placing client reviews anywhere.