What license is used for OpenCores?
To simplify life for users, developers are strongly encouraged to use an unmodified LGPL (Lesser GPL) license or the modified-BSD license. The modified-BSD license is the original BSD license with the ‘advertising clause’ removed. A modified-BSD style license essentially states that no warranty is given, the core may be distributed in source or binary form and the authors copyright must be acknowledged. http://en.wikipedia.org/wiki/Modified_BSD_licence The GNU Lesser General Public License (formerly the GNU Library General Public License) or LGPL is a free software license published by the Free Software Foundation (FSF). It was designed as a compromise between the strong-copyleft GNU General Public License or GPL and permissive licenses such as the BSD licenses and the MIT License. The GNU Lesser General Public License was written in 1991 (and updated in 1999, and again in 2007) by Richard Stallman, with legal advice from Eben Moglen.