Free content, libre content, libre information, or free information is any kind of creative work, such as a work of art, a book, a software program, or any other creative content unrestricted by copyright and other legal limitations on use. These are works or expressions which can be freely studied, applied, copied and/or modified, by anyone, for any purpose, including, in some cases, commercial purposes. Free content encompasses all works in the public domain and also those copyrighted works whose licenses honor and uphold the definition of free cultural work. In most countries, the Berne Convention grants copyright holders control over their creations by default. Therefore, copyrighted content must be explicitly declared free by the author(s), which is usually accomplished by referencing or including licensing statements from within the work. The right to reuse such a work is granted by the author(s) in a license known as a free license, a free distribution license, or an open license, depending on the rights assigned. These freedoms given to users in the reuse of works (that is, the right to freely use, study,...