FeResPost is distributed as a LGPL resource. This means that it is free, and that you can modify and re-distribute it gratis as long as you comply with ther therms of the LGPL license. (These are given in an Appendix of the User Manual.)

The LGPL license (Lesser General Public License) is similar to GPL license (General Public License) but is less restrictive and more adapated to software distributed as libraries and allows proprietary software to link their code to a library distributed under LGPL. The "L" of LGPL is sometimes considered to correspond to "Library".

We give below a few examples of what you may do or may not do with FeResPost:

• You may always compile your own code with FeResPost as long it is done for your own usage.

• You may link FeResPost to your proprietary application as a shared library and distribute your application together with FeResPost.

• You may modify FeResPost and link the modified library to your application. But then, you have to distribute the modified version of FeResPost with its sources under GPL or LGPL license, and with enough information to allowa any other user to understand the modifications that have been done, and allow him to recompile your sources.

The information given above correspond to my understanding of the LGPL license. As I am no lawyer, I can only recommend users to refer to the text of the LGPL license, and find more information from a lawyer competent in this area.

The text of LGPL license is given in an appendix of FeResPost Reference Manual.