Wayland is a project to define a protocol for a compositor to talk to its clients as well as a library implementation of the protocol.

X11 is described as 'The X.Org project provides an open source implementation of the X Window System. The development work is being done in conjunction with the freedesktop.org community. The X.Org Foundation is the educational non-profit corporation whose Board serves this effort, and whose Members' and is an app in the os & utilities category. There are six alternatives to X11 for Linux and Mac. The best X11 alternative is Wayland, which is both free and Open Source. Other great apps like X11 are Compiz, XLibre, Phoenix X server and XQuartz.
Wayland is a project to define a protocol for a compositor to talk to its clients as well as a library implementation of the protocol.

Compiz is a compositing manager adding fancy effects to your windows, from drop shadows to awesome desktop effects like the Desktop Cube or the Expo view.



The XLibre contributors strive to cleanup and strengthen the existing code base while maintaining backward compatibility to make X11 a viable choice for the future. Another goal is to actively enhance the functionality of the Xserver and its drivers.


Phoenix is a new X server, written from scratch in Zig (not a fork of Xorg server). This X server is designed to be a modern alternative to the Xorg server.
This provides a windowing system for some applications that normally run on Linux, as well as for forwarding GUI from the server to your client computer.

The purpose of Mir is to enable the development of user interfaces shells. In the case of Ubuntu, Mir will be utilized by next generation Unity. In addition, Mir will be developed in a manner that will retain its flexibility and usability in order that shells other than Unity...