Free SSH server for Windows. Not cygwin. Others listed here.
"Microsoft will also support the activation of Windows XP throughout its life and will likely provide an update that turns activation off at the end of the product's lifecycle so users would no longer be required to activate the product." Source: http://www.microsoft.com/norge/piracy/activation_faq.mspx
Myths
Peter Bright demonstrates that a large registry is not a slow registry.
Some anti-proof to the "Windows lifted TCP stack from BSD" myth.
quux's mexican jumping wiki 
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