4.
Tool usage and maintenance/tuning
Hand planes
Block Plane selection and rehab, Bob Smalser
Spokeshave tune-up, Bob Smalser
Getting started in handplanes, James Koepke
Everything you ever wanted to ask about molding planes but were afraid to ask.
Chisel
Chisel names, types and uses, Bob Smalser
Saws
Sharpening a handsaw, Bob Smalser
Resawing using a frame saw, by Bob Easton
BowSaw resources: by Peter Cobb. This post includes articles and videos on various bowsaw related topics (how to make, sharpen, use etc.)
Files and rasps
Card scrapers
Tuning Card Scrapers, Bob Smalser
An interesting thread on card scrapers. See post #7 by Derek Cohen for a link to his article.
Vices
Other