xsm: xsm (X11 Session Manager) xsm: xsm: xsm is part of X11. xsm: xsm: For more information about the X.Org Foundation (the providers of the xsm: X.Org implementation of the X Window System), see their website: xsm: xsm: http://www.x.org xsm: xsm: xsm: