Freeboard Project FreeBoard is a new way to provide navigation instruments on your boat.
Navgauge Navigation gauges & display in your browser
Navigatrix Navigatrix is a complete operating system for your computer. It is put together by people on boats for people on boats.
Open Skipper This is the Open Skipper project, which provides Open Source C# code for integrating and displaying NMEA 0183, NMEA 2000 and AIS data from nautical instruments, GPS units and internet data sources. Open Skipper provides a multi function display (MFD) showing electronic instruments displaying speed, heading, etc
OpenCPN OpenCPN is a free software (GPLv2) project to create a concise chart plotter and navigation software, for use underway or as a planning tool. OpenCPN is developed by a team of active sailors using real world conditions for program testing and refinement.
OpenSeas Project Open Source, Open Standards, OpenSeas
PX4 PX4 is an independent, open-source, open-hardware project aiming at providing a high-end autopilot to the academic, hobby and industrial communities (BSD licensed) at low costs and high availability.
The Marine Installers Rant A BLOG ABOUT THE THINGS BOAT BUILDERS DO THAT COST YOU MONEY, AND OTHER ECLECTIC NEWSY MUSINGS OF INTEREST TO BOATERS
Kplex kplex is a multitransport software data multiplexer which runs on GNU/Linux, Mac OS X, FreeBSD, NetBSD and OpenWRT. It works with data which conform to the NMEA-0183 standard, but has been written without reference to any proprietary documentation not available in the public domain. Kplex multiplexes data inputs from sources such as serial lines, pseudo terminals and network interfaces and send to any (reasonable) number of outputs. kplex can perform filtering of inputs (so you only get the data you want, or don’t get the data you don’t want from a given source) and outputs (so you only send what you want where you want) and can perform fine-grained failover so that for any given type of data, you specify a priority order of the source you would like to take it from.