Packages with the xcomposite use flag

Global definition: Enable support for the Xorg composite extension.

app-emulation / wine-any : Free implementation of Windows(tm) on Unix, with optional external patchsets

app-emulation / wine-d3d9 : Free implementation of Windows(tm) on Unix, with Gallium Nine patchset

app-emulation / wine-staging : Free implementation of Windows(tm) on Unix, with Wine-Staging patchset

app-emulation / wine-vanilla : Free implementation of Windows(tm) on Unix, without external patchsets

dev-qt / qtwayland : Wayland platform plugin for Qt

x11-libs / libaosd : An advanced on screen display (OSD) library

x11-misc / x11vnc : A VNC server for real X displays

x11-wm / e16 : Enlightenment Window Manager (E16)

xfce-base / xfwm4 : Window manager for the Xfce desktop environment