Vacanti Yacht Design
The program PROLINES has been used to design everything from model sailboats to tugboats. The keel and rudder design software has been used extensively on winning racing yachts world wide. http://www.vacantisw.com/
Ted Brewer Yacht Design
Provides stock plans for sail and power vessels or can create an original yacht design. Located at Gabriola Island, British Columbia, Canada. http://www.tedbrewer.com