Libsx is an attempt to simplify the vagaries of programming under X windows, making it simple to create user interfaces for programs. With libsx, 10 lines of code may be all you need to create a user-interface complete with many different types of widgets. Libsx is layered on top of the Athena widget set and basically acts as a front end to all the Athena and Xlib garbage so that programming reasonable interfaces isn't so painful.
