10 Best sailing apps (android)
Android market https://play.google.com/store?hl=en

Many of the articles covering sailing apps are very US focused. As US charting, weather and tide information does not apply anywhere else in the world, we are keeping a close eye on apps that have broader applications. After all, cruisers and racers tend to sail all over the place whether on their own boat or OPBs (other people’s boats).

For Android (as of March 2012)
1.   Navionics Charts
2.   NOAA Buoy and Tide Data
3.   Passage Weather
4.   Tide Graph
5.   EarthNC (with Google Earth integration)
covers US, Bahamas, New Zealand and Brazil
6.   PredictWind
7.   PocketNav (integrates with ActiveCaptain)
8.   Marine Charts
9.   Google Sky Map
10.   Boater’s Pocket Reference

Here are some other neat apps:
Ship Finder
RYA Handy Racing Rules
Nautical chart symbols
SAS Survival Guide
Currents
Buoy Weather
Weather Eye
Marine Traffic
Memory-Map (NOAA Raster charts)
MxMariner
Marine Charts HD & Lite
NutiCharts Lite
AveTides
Tides Planner 10
Tide Graph
Tidal Chronoscope
History of sailing
Tide7 (UK, Ireland, Benelux)
Marine Traffic
Racing Rules of Sailing (US Sailing) [Costs €4.43 and has some pretty bad user ratings.]

Vice Commodore, OCC