Easy Digital Downloads with PayPal once associated mostly with payments on the online auction site eBay. It has become a widely accepted method of payment both online and off.

The idea is simple: Give people the ability to accept payment online quickly and securely without having to use a credit card. Although PayPal has occasionally had trouble with fraud, lawsuits and zealous government regulators, the company now boasts over 277 million active accounts [source: PayPal].