mcwm is a minimalistic window manager implemented using XCB. It doesn't use libX11 at all. It is a traditional floating window manager with no fancy smarts like those in modern tiling window managers.
Software to manipulate, monitor, and manage messages in a queue of a WebSphere MQ (formally MQSeries) queue manager from a command-line or shell scripting environment.
A framework to implement custom command line interfaces (CLI).