We are currently investigating different remote-desktop support solutions to help our clients if they have any problems with our software and I would like some input on the best solutions out there. We have the following needs / wishes: Cross platform Preferrably no installation on the user-end Should penetrate firewalls and not be bothered by antivirus stuff. Should leave no residu behind after support. I know of VNC, logmeinrescue.com, dameware remote control, msn remote desktop and many others, but which one is the best?