smooth is an object oriented C++ class library for Windows, macOS,
Linux and most Unix-like operating systems. It provides basic
functionality and platform support for applications and libraries.

Features provided by smooth include:

    a user interface API with various widgets
    a simple to use multithreading API
    a file and network IO interface
    completely transparent Unicode and software internationalization support
    a libxml2 based XML parser

Homepage:
https://www.smooth-project.org/
