Introducing the Number1; Open Source DMX512 / RDM hardware.
Open Lighting Architecture
Described as the Travel Adaptor for the Lighting Industry, the Open Lighting Architecture provides a flexible way to interconnect different lighting equipment, allowing you to spend less time dealing with low-level communication issues and more time designing the show.
It supports all the major DMX-over-Ethernet protocols including ArtNet and Streaming ACN, and over 20 different USB DMX dongles.
RDM Development Tools
The Open Lighting Project has developed a number tools for debugging & testing RDM implementations.