What is the LGPL?
The GNU Library General Public License was also developed by the Free Software Foundation. It is similar to the GPL, but it introduces the idea that a library of functions covered by the LGPL may be used by a program without the program being a derivative work of the library. This allows the program to be issued under different terms than the LGPL. This makes the LGPL less restrictive (the developer is compelled to release the source code to less of his work) than the GPL. (Only changes to the library itself would have to be made public.