Replacing the default SSH keys used by NX with keys generated for your server To increase the security of a NX server installation administrators have the possibility to replace the default keys used by clients to actually login to NX server with a SSH key generated per-server.
Xming is the leading free unlimited X Window server for Microsoft Windows (XP/2003/Vista). Xming is fully featured, small and fast, simple to install and because it is standalone native Microsoft Windows, easily transported [WWW]portable as a Pocket PC X
Dzen is a general purpose messaging, notification and menuing program for X11. It was desigend to be scriptable in any language and integrate well with window managers like dwm, wmii and xmonad though it will work with any windowmanger.
whaw is a program for X11 that can use advanced tiling algorithms and an intuitive user interface to quickly lay out windows without having to replace or modify the set up of your window manager of choice. whaw is meant to augment the capabilities of your current window manager, not supplant them.