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In page X window manager:

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Historically, the Amiga in 1985, OSX in 2001, Java Looking Glass in 2003, and the Windows Longhorn demo in 2003 (delayed until Vista in 2007) preceded compositing efforts under X11. Compositing window managers for X include:

  • GNOME's Mutter née Metacity (first dev-branch compositor in 2.7[citation needed] or 2.8 Wayback Machine of 2004 Linux Today - Release Digest: GNOME, August 30, 2004—original stable-branch compositor since 2.14 in 2005 Re: About Compositing or 2006 Metacity branched for 2.14—current compositor architecture since 2.22 Enable Metacity Compositing in GNOME 2.22 | Tombuntu in 2008—Metacity+Clutter begat Mutter in 2011),
  • Xfce's Xfwm (since 4.2 of 2004[citation needed] or 2005 Xfce 4.2.0 released!),