The LaTeX Project Public License
This classification is a generalization of the license promoted by the LaTeX3 project and used by LaTeX itself and many LaTeX classes and packages. There are several versions with the name LPPL around.
Please check the software's license before using the software.
Please note that the latest version is LPPL 1.3c. Version 1.3c should be used for all new work distributed under the LPPL.