Eckhart is the developer of many useful Newton packages, such as The Fish (Notes encryption), Courier (text-based webbrowser) and MAD Newton (MAD-based MP3 decoder for Newton). He is best known for his work on Newton communication interfaces with Nitro (which brings the [[IrCOMM]] Communications Protocol to Newton) and most of all Blunt, the Newton [[Bluetooth]] driver. As of Spring 2006, a major redesign of the Bluetooth driver is underway (Blunt 2).
His software is open source (GPL- or LGPL-licensed) and available with source code from his website 40Hz.org.
You can follow the progress of Eckhart's projects at his web log.
See also 40Hz.