xpra is my favored tool out of plain X forwarding / vnc / (free)nx / x2go / etc, but one issue I have with it (at least last time I used it) is that it requires

xpra is my favored tool out of plain X forwarding / vnc / (free)nx / x2go / etc, but one issue I have with it (at least last time I used it) is that it requires the version string to be identical on both client and server. This, combined with it being written in python, means that every distro packages it differently, has a different version number, and if you want to just clone it and run it yourself, now you have to deal with python / virtualenv / whatever hell. Other than that, it's pretty great.