Delftship,
a boat design software package, is available in a free version.
The features of the free version are somewhat limited,
so V.F. Timoshenko has picked up development of an open-source version
called FreeShip. Freeship seems not to have a home page, but can
be found at various sites. Here's a link to
FreeShip Plus 3.1+, but you may want to search for newer versions. FreeShip and Delftship files are cross-compatible.
Michlet,
a free boat drag prediction package
Toni Vakiparta's site, which has
Freeship/Delftship models of quite a few KOG kayaks, along with comparisons of
predicted speed and technical characteristics
Freeship/Delftship model of the Goodnow,
a kayak collected by Robert Peary's 1896 expedition to Greenland.
This kayak is displayed at the Sudbury (MA) Goodnow
Library (hence its common name), and is close to the hearts of Walden
paddlers.
Brooks paddle gear
Bug
Head neoprene tuiliks and Greenland gear (sadly, going out of business)
Superior
traditional kayaks, paddles, and gear