The Minimalist Boater (Insights, philosophy, musings and mostly good vibes about getting the most enjoyment for the least money while just generally messing about in and with boats)
The Multihull Boatbuilder Page (A free exchange of building and design information for simple, efficient, economic homebuilt multihulls)
One Ocean Kayaks (How-to tips, articles about sandwich core principles, epoxy, abrasion fabrics, material resources for builders and hundreds of pictures of kayaks under construction)
The Oregon Coots (AKA Western Oregon Messabouts, small boat enthusiasts and builders)
The World of Ferroboats.com ("Devoted to the promotion of Ferroboats as well as a base for all matters Ferro in the boating world," at Hartley & Brookes)
Yostwerks (Tom Yost's aluminum frame folding and wood frame skiined kayak, and inflatable kayak manuals, with free plans)