'Live Kd', and 'Sky Fex'

Live Kd

LiveKd, a utility that allows you to view the local system as if it were a crash dump using the standard Microsoft kernel debuggers.

http://www.sysinternals.com/Utilities/Livekd.html

Sky Fex

SkyFex Remote Assistant is a free service that allows seeing what is happening on the remote computer desktop in real time. This is a secure service, does not require additional software installation and configuration and works transparently through proxy/firewall and NAT networks. SkyFex is Windows based and requires Internet Explorer to run it. No special knowledge is necessary to work with the service. You can start using it immediately without preliminary training.

http://www.skyfexfree.com/