Xgl 是一个X server，他借由OpenGL技术充分发挥了新一代显卡优异的3D立体画面表现能力；从「架构」的角度来看，XGL透过了glitz位在OpenGL的上层。XGL利用了聚合窗口管理器的帮助（像是Compiz 或 Beryl）对所有使用X、OpenGL和XVideo所制作的应用和图形效果提供了硬件加速的支持，所以能表现出包含调整窗口透明度、可旋转的3D桌面、果冻效果等等令人叹为观止的立体特效。这个计划最初由David Reveman发起，并在2006年1月2日的时候第一次发布（release）。

Xgl is a display server implementation supporting the X Window System protocol designed to take advantage of modern graphics cards via their OpenGL drivers, layered on top of OpenGL via glitz. It supports hardware acceleration of all X, OpenGL and XVideo applications and graphical effects by a compositing window manager such as Compiz or Beryl. The project was started by David Reveman of Novell and first released on January 2, 2006. It was removed from the X.org server in favor of AIGLX on June 12, 2008.