Gratis versus Libre is the distinction between zero price (gratis) and freedom (libre). Gratis is slowly becoming more common in the English language. However, libre has not, and no English adjective signifies freedom only. This distinction is often important in dealing with laws concerning the use of information, such as copyright and patents. The terms are often used in the free software and open source communities, as well as the broader free culture movement.

Free as in beer versus free as in speech

Extragratis