The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others.

The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives.

Click here for more details about OFL.

There are people who design typefaces for a living, and we want them to make money off of something that they do well. This revolution is not a movement against type foundries and type designers; it's quite the opposite. The kind of revolution we want is a change in the way people think about doing business. We want type foundries and typographers to start thinking,

"Maybe there's nothing wrong with giving things away sometimes."

You can also check out The League of Movable Type and The League's Typeblog website, a place to share OFL fonts.