Erwin Puts has a downloadable databook of Leica M bodies and lenses.
Erwin Puts gives us a tour of his five Leicas.
A cool visual library of M cameras.
Steve Huff reviews M system equipment (and other brands).
An M3 review from Edwin Leong laying out the pros & cons of rangefinders – very good article if you’ve never tried a rangefinder.
An M6 review from Kirk Tuck in 2001 that’s another good starting point for those new to rangefinders.