A concise ChartPlotter/Navigator. A cross-platform ship-borne GUI application supporting * GPS/GPDS Postition Input * BSB Raster Chart Display * S57 Vector ENChart Display * AIS Input Decoding * Waypoint Autopilot Navigation

GPS log file viewer and analyzer with support for GPX, TCX, KML, FIT, IGC, NMEA, SLF, SML, LOC, GPI, GeoJSON and OziExplorer files.

NMEA and ublox GPS parser for Arduino, configurable to use as few as 10 bytes of RAM

Python Graphical GPS Client Application supporting NMEA, UBX, RTCM3, NTRIP & SPARTN Protocols

AIS receiver for RTL SDR dongles, Airspy R2, Airspy Mini, Airspy HF+, HackRF, SDRplay and SoapySDR

Lightweight GPS NMEA parser for embedded systems

Lightweight C library for parsing NMEA 0183 sentences

Java Marine API - NMEA 0183 library for Java

A NMEA parser and GPS utility library

With BBN OS you can build a central boat computer. BBN OS is free and open source. It is based on commonly used community supported open source projects such as SignalK, PyPilot, OpenCPN, and others. BBN OS graphical user interface will let you build a cockpit front-end to all functionality of the OS from chartplotting, dashboards, weather, etc.

A NMEA parser library in pure Go

Opensource hardware and software solutions for sailing and sailboats

AIS message decoding and encoding in Python (AIVDM/AIVDO)

C++ 11 NMEA Parser and GPS Interface

.NET Standard, high performance, zero allocation AIS decoder, which can process millions of AIVDM/AIVDO sentences per second on a single core. Sponsored by endjin

GPS NMEA Library for stm32 LL

A compact Arduino library to parse NMEA sentences.

a library for MARitime NAVigation

Utilities for Raspberry Pi, mostly for usage on a boat. Includes UART control scripts, traffic measurement tools for Mikrotik (RouterOS) and OpenWrt, AIS wireless daemon, AIS decoder and an extensible boat & IoT sensor daemon for Signal K.

Python library for parsing/generating u-blox UBX protocol messages, and for creating parsers/generators in other languages.