Most people I've met, when I talk about Open Source Software, have a hard time understanding why people would choose to give their software away for free. One of the questions I hear often is, "But then how do you make money?"

Actually, you have it all wrong. Very few applications written by developers today are ever sold. Most applications are "in house" - in other words, they are written internally by a business to fulfill the needs of the business, as opposed to being written to be sold.