E-junkie
E-junkie is a copy-and-paste solution for selling tangible items and digital downloads wherever you can insert its HTML. You can sell fixed-price items, receive donations or offer a "set your own price" product.
PayPal Labs' Storefront Widget
PayPal Labs' free Storefront widget lets you create a compact store for products and services that you can drop onto any site that allows HTML. It gives you options for item variations and inventory control, and creates a shopping cart right in the widget.
Shopit lets you sell your products and services through apps on Facebook and MySpace, as well as an HTML widget. It's free to use, integrates with Facebook's social features and lets you import your eBay and Yahoo Stores.
Zazzle
Zazzle lets you sell branded products and pull in 10 percent or more in royalties. Its Merch Booth widget integrates with MySpace and gives you the HTML to paste it anywhere else. Clicking on a widget item sends users to your Zazzle store to shop and check out.
This story, "Web 2.0 Payment Apps " was originally published by Entrepreneur.com.