phpBuoy
phpBuoy is a simple little PHP script which parses the realtime buoy data provided by the National Data Buoy Center and presents it in a nicely formatted HTML table. It's quite easy to use as a PHP or SSI include and the script can get data for any buoy listed on the NDBC site. There are complete customization instructions included within the file, including the ability to display data in metric or English measurements, select from 12 or 24 hour clock, and choose from American MM-DD-YYYY or International DD-MM-YYYY date formats.