Remuco is a duplex remote control system for Linux media players and mobile phones equipped with Bluetooth or WiFi. Remuco can be used with Amarok, Audacious, Banshee, Exaile, MPD, MPlayer, Rhythmbox, Songbird, Totem, TVtime, VLC and XMMS2.
Window Switch is a tool which allows you to display running applications on other computers than the one you start them on. Once an application has been started via a winswitch server, it can be displayed on other machines running winswitch client, as required
This mini-HOWTO describes how to run remote X applications
This Mini-HOWTO describes how to connect X Terminals with a Linux host using nfs, xfs, xdm and xdmcp.