The development of this standard began in 1994. It was released in 2001 The standard NMEA 2000(R) is a low-cost serial data network operating at 250 kbits/s based on CAN substituting NMEA0183.
CANCapture - http://www.cancapture.com - Flexible, powerful, and low-cost control of data, supporting J1939, NMEA-2000 and all other protocols. All features including hardware for one low price.
Development tools and embedded software components: http://www.vector-informatik.com/vi_nmea2000_en.html
High-performance NMEA2000 protocol stack software http://www.simmasoftware.com/nmea2000-protocol-stack.html
Warwick Control (UK) http://www.warwickcontrol.com
The NMEA committee sells a protocol and hardware validation tool and an official protocol stack.
German http://de.wikipedia.org/wiki/National_Marine_Electronics_Association