[westurner]

IIRC WinSwitch + xpra could do seamless windows: http://winswitch.org/documentation/faq.html#protocols http://winswitch.org/about/ :

> 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.

> You no longer need to save and send documents to move them around, simply move the view of the application to the machine where you need to access it.

Wikipedia/Neatx links to https://en.wikipedia.org/wiki/Remmina (C) :

> It supports the Remote Desktop Protocol (RDP), VNC, NX, XDMCP, SPICE, X2Go and SSH protocols and uses FreeRDP as foundation.

But no xpra, for which Neatx has old python 2 scripts.