Q:

Cross platform Gui library with liberal license

I am looking for a cross platform gui library that can be used to create dialog boxes, that must fit the following requirements:

Be written in C or C++.
Be compatible with at least Windows, Mac and Linux.
Be relatively mature.
Be under a license that does not require Copyright text in the documentation of derivative works distributed in compiled form. Examples of good licenses would be the Zlib/libpng license, the Boost software license and of course public domain. Unusable licenses include LGPL, BSD, MIT etc.

Does anyone have any tips?
Kind regards,
Philip Bennefall

A:

I'd go with wxwidgets. According to the license it it essentially LGPL with the following exception that applies to your question:

The exception is that you may use, copy, link, modify and distribute
  under your own terms, binary object code versions of works based on the
  Library.

