Cruising

Noonsite
The global site for cruising sailors. Something you can’t do without.
Sailnet forums
Sailing adventures of watermelon
Find a crew
Survival at Sea

DIY

Don Casey Library
Good resource for DIY articles
DIY Boat Owner

Electrical

BDBatteries Solar Calculator
Zena Alternators
Electric Vehicle USA
SD Electric bike LiFePo4 batteries
Agnimotors
Thunderstruck
Cloud Electric
TPPacks
Falcon EV
Electric Motor Sport
Everspring
Thunder-Sky
Endless-sphere

Engines and Generators

Diesel Engine Motor
Christie Engineering
Build a generator
EPower

Boat building/design

Building a fibreglass fishing boat
Boat Design
Glen L
Boat Design Forums
Hawaii Marine Templates
Micro Trimaran
Building a rig
Boat Design Forums

Education

Westlawn
List of schools

Rigging

Synthetic Standing Rigging
Precourt Synthetic
Rotating Wing Mast – theoretical discussion
Split boom rig study
Hampidjan
Colligo Marine
Rigging Small Sailboats
SparTalk
Aerodynamics Of Teardrop Wingmasts (PDF)

Hydraulics

Fluid Power Basics
Hydraulic Supermarket
Principles of Hydraulics

Software

MaxSea
Fugawi
Coastal Explorer
NobelTech

Magazines

Mad Mariner
Cruising World
Good Old Boat
Latitude 38

Insurance

Boat insurance types and costs

Used Sails

Pineapple Sails
Sail Exchange
Minney's
EP Sails
Sail Warehouse

Macro Man
An interesting macro blog.
Calculated Risk
Good insight, updated daily. Wealth of graphs and timely information.