GeoGebra - Dynamic Mathematics for Everyone http://www.geogebra.org/ LICENSE 1) GeoGebra Language Files and Documentation License: Creative Commons Attribution-Share Alike 3.0 or later 2) GeoGebra Source Code License: GNU General Public License v2 or later 3) GeoGebra Installers License: Creative Commons Attribution-Noncommercial-Share Alike 3.0 or later Note for Commercial Users (e.g. publishers or online schools) If you would like to use GeoGebra applets, installers, or documentation for commercial purposes and put the resulting work under your copyright (e.g. for books, online courses, or on websites under your own copyright), you can do so by setting up a commercial usage agreement with GeoGebra. Please write to office@geogebra.org for details and we will help you to find a simple and good solution for your specific purposes. Note for Non-commercial Users (e.g private, schools, or universities) You may use and distribute GeoGebra free of charge at home, in school and universities under the conditions explained below. ---------------------------------------------------------------------- 1) GeoGebra Language Files and Documentation License All GeoGebra language and documentation files are subject to the following Creative Commons Attribution-Share Alike License; either version 3.0 of the License, or (at your option) any later version (see http://creativecommons.org/licenses/by-sa/3.0/): You are free to copy, distribute, transmit, and adapt GeoGebra language files and documentation under the following conditions: * Attribution. You must attribute the work (i.e. by linking to http://www.geogebra.org/) * Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under the same, similar or a compatible license. GeoGebra file types that are subject to the abovmentioned license: * GeoGebra language files are ... the user interface language files ("properties files") for all languages used by the GeoGebra application and applets. They are part of every official GeoGebra binary distribution. * GeoGebra documentation files are ... all "GeoGebra Help", "GeoGebra Quickstart" and other documentation files found on the GeoGebra webserver. ---------------------------------------------------------------------- 2) GeoGebra Source Code License GeoGebra's source code is subject to the GNU General Public License (see http://www.gnu.org/licenses/): This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You can find GeoGebra's source code at http://www.geogebra.org/source/program/ If you would like to help with programming, please write to office@geogebra.org ---------------------------------------------------------------------- 3) GeoGebra Installers License All GeoGebra installers are subject to the following Creative Commons Attribution-Noncommercial-Share Alike License; either version 3.0 of the License, or (at your option) any later version (see http://creativecommons.org/licenses/by-nc-sa/3.0/): You are free to copy, distribute, transmit, and adapt GeoGebra installers under the following conditions: * Attribution. You must attribute the work (i.e. by linking to http://www.geogebra.org/) * Noncommercial. You may not use this work for commercial purposes (unless you have approval from GeoGebra, please contact us at office@geogebra.org). * Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under the same, similar or a compatible license. GeoGebra installers are ... installation packages that let you install the GeoGebra application and/or documentation files on your system (MS Windows, Mac OS X, Linux, etc.) including GeoGebra WebStart. ---------------------------------------------------------------------- Last change of this document: 2009-11-27