The JX Application Framework is now available under the LGPL instead of a commercial license! JX is a full-featured C++ application framework and widget library (SDK) for use with the X Window System. The library provides a wide variety of widgets for use in your program's windows along with useful functionality that connects the widgets and windows to make complete, working software.
A notable new feature in version 2.5.0 is support for compiling on Cygwin and OS X. The Windows port is still under development.... read more