CherSoft have developed the second generation EasyTide web service for the United Kingdom Hydrographic Office.
EasyTide is a website which gives free tidal predictions for the forthcoming week. Predictions for other dates are available by registering on the site and paying a small fee. CherSoft developed both the website and the engine producing the tidal predictions.
You can use the EasyTide website at http://www.easytide.com.