Amsterdam Port Authority
Information about the port's activities and development including the arrival and departure times of ships and cruisers.
http://www.portofamsterdam.com/

Dutch Flyer
Formerly known as the Amsterdam Express, Stena Line's Dutchflyer service provides city-to-city travel for anyone wishing to travel from Britain to Holland by train and ferry.
http://www.dutchflyer.co.uk/
http://www.stenaline.co.uk/

One Stop Ferry Shop
An overview of ferry services between the UK and Holland.
http://www.ferry-crossings-uk.gb.com/ferries-to-holland.htm