Other Dart sites
Windsport - where to buy your new Sprint 15!
Dart 18 - the UK International Dart 18 Association
Dart 16 - the UKIDA Dart 16 website

Catamaran sites
Catamaran.co.uk - a UK site dedicated to cat sailing
Windsport - the place for cat sailing courses in the UK

Sailing Organisations
The RYA - The Royal Yachting Association, the home of UK sailing
The ISAF - including the racing rules

General sailing sites
Yachts & Yachting Magazine - the website of the UK's premier dinghy racing magazine
Madforsailing - subscription website with sailing news, etc.
Dinghy.Org - links to lots of sailing sites
UK Dinghy Racing - info and discussion
Sailshots - sailing photography
UK Sailing index - full of links to UK sailing websites

Weather
UK Wind Map - great site for finding out what the winds like now
Online weather - Sailing and 4 day forecasts for lots of UK locations
BBC Weather - the BBC's online weather forecast
Ant Veal's Weather Centre - contains a very comprehensive set of links to weather sites
The Met. Office - the home of UK weather forecasts

Insurance
W.H. Insurance Consultants - insurance for Dart sailors