Gadget-advice site Retrevo focuses on helping you shop for items in popular categories such as HDTVs, cameras, camcorders, laptops, tablets and phones. It aims to steer you toward the right choice for you (it has different recommendations for early adopters and bargain hounds) and to make sure you buy at the right moment (it tracks prices over time to determine if they're rising, falling or holding steady). Its unique Value Maps show how multiple products in a category compare for cost and quality. Other useful features include specs, user reviews and links to online merchants that offer the products in question.