I have several apps on my iPod some are limited by no GPS but they are still nice to have.
1. Navionics - PNW
2. Charts & Tides w/Active Captain support
3. Marine Chars EarthNC
4. eSeaChart U.S. Marine Charts w/Active Captain support - New
5. Boaters Pocket Reference
6. NOAA Buoy and Tide Data
8. Knot Guide
9. Animated Knoits by Grog
10. Nautical Chart Symbols
11. Nav Lights
13. Expert Video: Sailing
14. Sailboat Discussion Forum - SBO Sailboat Owners
15. and a few handy utilities to use on the go.
Yes I guess I am a bit over the top with apps but they are nice toys for the ipod and in future they will be mine to load onto an iPad 4G or something.