Screen for X11

Finally!!! I think I found a key application I've been searching for.... some time. Basically it is like GNU screen for X11 :)
Take a look at it: http://code.google.com/p/partiwm/wiki/xpra

It is also available in Ubuntu, just:

apt-get install xpra

From its description:

Xpra gives you "persistent remote applications" for X. That is, unlike normal X applications, applications run with xpra are "persistent" -- you can run them remotely, and they don't die if your connection does. You can detach them, and reattach them later -- even from another computer -- with no loss of state. And unlike VNC or RDP, xpra is for remote applications, not remote desktops -- individual applications show up as individual windows on your screen, managed by your window manager. They're not trapped in a box.

Gnome Workspace Switcher and managing (moving) windows.

I have a dual-head setup (NVidia TwinView) where the second screen is an overhead projector. I would find it extremely useful if I could just drag windows using the Workspace Switcher between my screens. This would help a lot especially at times when the projector is blanked or switched off and I would like to move some windows to be projected when switched on/unblanked.

Beware... tadaaaaa...Since yesterday windows can be dragged not only to a different workspace (without altering their relative position) but also within the workspace. I made a modification to libwnck (the library which implements the pager and allows to manipulate windows) which implements this feature and submitted it upstream. I wonder if it is going to be committed to the next Gnome release or not... we'll see.

Anyway you you would like o use this functionality in Ubuntu 9.10 Karmic Koala, here is a link to my PPA: https://launchpad.net/~wojnicki/+archive/ppa

And if you want to compile libwnck by yourself you can find the appropriate patch at the feature request: https://bugzilla.gnome.org/show_bug.cgi?id=604207