Links to software packages, that could be worth looking at




Software for passage planning
http://www.digwave.com/
Software for learning and using sextants http://www.pangolin.co.nz/astro.php 



Links to books on cruising



Here is a shameless plug for my (KenWilliams') book about the Nordhavn rally across the Atlantic. It really won't help you at all to prepare for this voyage, and I confess to being a better computer programmer than writer -- but, I couldn't stop myself plugging the book anyhow http://www.kensbook.com