iMap - excellent visualization of weather, but need good internet connection
Thai Met Office - Shipping forecasts and all other info in English
Malaysia Met Office - Seven day marine forecasts in English
Singapore Met Office - Marine weather info, radar, winds, waves
Australia Met Office - Marine weather info
Indonesia Met Office - Marine weather, earthquakes, radar etc
Tropical Cyclone Info - New Zealand Met Office
Tropical Cyclones - UK Met Office sites with list of all regional service providers