Version 1.1 of the definition has been released. Please help updating it, contribute translations, and help us with the design of logos and buttons to identify free cultural works and licenses!
There is no Free Art Definition, but the Free Art License is in the spirit of this definition.
Cf. the Free Software Definition.
Internet Engineering Task Force
The Internet Engineering Task Force (IETF), which is the body governing the drafting and evolution of Internet protocols - without which the Internet, an unified interconnection of physically disparate networks, couldn't even exist -, has rules concerning the rights that are granted on its published documents. Although a subtle restriction on derivative works makes some of these documents not completely free, it is a good example of how Free Content's essential freedoms can be fruitfully applied to promote scientific and technical progress.
Cf. the Open Knowledge Definition.
Cf. the Open Source Definition, but note the philosophical differences to the Free Software movement; also note that the term is, in spite of its definition, somewhat diluted, especially in contexts other than software.
Libre Knowledge is championed by Libre.org and others such as the Free Knowledge Institute.