A small contribution to the winehq fixes: A list of dead or non-functional links on the Development/References page. (http://www.winehq.com/development/index.php?refs)
Wine
Wine API - mostly useless, IMHO (is this really up-to-date? - at least it shouldn't be on top of the page). Vintage wine sources - ftpsearch.ntnu.no unfortunately out of service.
Win32
Win32 API intro - dead WinDoc - only the "Local Mirror" works, the "at microsoft.com" links bring you to the main MSDN site.
Unix
Unix98 - needs registration LinuxThreads - why is this linked here? AFAIK not used by wine anyway.
X
The motif zone - dead lamentation - dead
Fonts
Internet Font archive - gone. X11R6 fonts - dead t1lib -dead Curvesoft - have ceased operations, a few tools still available.
x86 Assembly
Intel Documentation - dead
Writings on software development
Homesteading the Noosphere - dead Lisp... - I don't know why it's there, but I love it :-) The Open Source-revolution - dead
Martin