xchainkeys is a standalone X11 program to create chained key bindings similar to those found in the ratpoison window manager or the screen terminal multiplexer.
Xpra is 'screen for X': it allows you to run X programs, usually on a remote host, direct their display to your local machine, and then to disconnect from these programs and reconnect from the same or another machine, without losing any state. It gives you remote access to individual applications.
