"Exploring ideas for a modified copyleft license can't hurt." - Richard M. Stallman, July 2012
copyleft-next is a new, experimental strong copyleft license inspired by, though different from, the GNU GPL. It is not a fork of the GPL. While copyleft-next started out as a modification of GPLv3, it currently bears very little textual resemblance to GPLv3.
"Strong" refers to the Free Software Foundation's traditional and influential characterization of the difference in copyleft scope between a weak copyleft license (like the LGPL) and a strong copyleft license like the GPL. "Strong" is not meant in any broader sense.
Contributions of patches, ideas, and criticism are welcome. In particular, the Copyleft-Next Project actively seeks the participation of open source/ free software project developers who may not have considered helping with license drafting before. License drafting is fundamentally about establishing policies for projects, and therefore input from developers is typically more valuable than input from lawyers.
Needless to say, no one should actually consider using a development version of copyleft-next as an actual license. A "development version" is a version of the file "copyleft-next" in the Drafts directory, and/or any version of copyleft-next made available by this project with the heading "THIS IS A DRAFT. DO NOT USE AS A LICENSE" (or other wording to the same effect). Numbered releases of copyleft-next will be stored in the Releases directory.
The Copyleft-Next Project is not an effort endorsed by the Free Software Foundation or the GNU Project. It is is also not an effort associated in any way with (e.g.) Red Hat, or any other corporate entity. Contributors are expected and assumed to participate in their individual capacity unless they indicate otherwise.
All communications with journalists shall be handled by the Copyleft-Next Marketing Committee, which does not exist yet and probably won't exist for at least another year or three. For the avoidance of doubt, Simon Phipps is not considered a journalist.