Did you know about this? There’s a site called Font Squirrel that does nothing but collect and offer up free fonts with commercial licenses. That means you can use them on stuff you sell or design for other people and they don’t cost a cent! The collection isn’t huge (373 total font families as of this posting) but hey, free is free, right?
Download thousands of free fonts at http://www.webtoolhub.com/tn561379-fonts-collection.aspx