OpenCPN is free, open source software for marine navigation. It is available for Mac OSX, Microsoft Windows, GNU/Linux, BSDs and Solaris. The latest stable version of OpenCPN is 4.4.0 released 13 June 2016.
Plugins for OpenCPN are third party feature additions that expand the functionality of OpenCPN into those niche areas. Here you will find available Plugins to download.
Install your own icons to use with marks and "own ship".
Layers library consists of user-contributed overlays showing various navigational items of interest.
Pilot charts show historical monthly meterological conditions for large worldwide regions.
The default chart style can be changed to look different. JesperWe's Swedish-look palette or SHOM.
Updated tides for North America.
Important note for OpenCPN 4.0 (and earlier) users. Upgrade to the latest version of OpenCPN. Really. It is much better and more stable than the version you are running now. We will not post any more updates to the older version plugins available here, ever.
Compressed or zipped OpenCPN documentation from the archives.