Here are a few Apps that* I find very useful on my Droid.* to find them just go to your "market" icon and use the search feature.* Type in exactly as I have them posted here.
Tide Chart Free - this will give you a graphic of the tide location you select using GPS.
FCN Wx - a Florida based weather radar system overlayed on Google Earth.....will locate to your position with buit in GPS
Marine Weather by Bluefin - gives you marine weather. wave heights using offshore bouys
Windfinder - offshore marine forecasts