OpenCPN is described as 'free software (GPLv2) project to create a concise chart plotter and navigation software, for use underway or as a planning tool' and is an app in the Travel & Location category. There are three alternatives to OpenCPN for Online / Web-based, Self-Hosted solutions, Windows, Linux and Mac. The best alternative is zyGrib, which is both free and Open Source. Other great apps like OpenCPN are Open Nautical Charts (Free, Open Source) and OpenSeaMap (Free, Open Source).
- 3 alternatives