A j1939 (and ISOBUS) stack on https://gitorious.org/linux-can/linux-can-j1939 was developed by Kurt Van Dijck kurt.van.dijck@eia.be

ISOAgLib is an Open-Source programming library. As part of an ISOBUS-system, it takes over all functions embedded in an electronic communication system according to the standard ISO 11783 such as display of user interfaces on a Virtual Terminal (VT) or Task controller (TC).

Noregon has stopped its J1939 products in 2012

Warwick Control