smooth: smooth (cross-platform object-oriented C++ class library) smooth: smooth: smooth is an object oriented C++ class library for Windows, macOS, smooth: Linux and most Unix-like operating systems. smooth: It provides basic functionality and platform support for smooth: applications and libraries. smooth: Features provided by smooth include: smooth: a user interface API with various widgets; a file and network IO smooth: interface; transparent Unicode and software internationalization smooth: support; and more. smooth: See also: http://www.smooth-project.org/