My favorite is www.QuickCart.com. It's easy to use (no programming required!), has a bunch of tools: WYSIWYG page builders, Unlimited Categories / Sub-Categories, Dynamic Product Options, Dynamic FAQ builders, Designer tools, SSL Built-In, and integrates with pre-existing websites, as well as Authorize.net, PayPal, Google and LinkPoint easily. If you're interested, check out their free trial. It'll let you create your store and, if you like what you see, upgrade it to the full version without any extra hassle. There's no transaction or startup fees either. Try it out