CHIRP D-STAR programming software

Radio Amateurs have developed a extensive range of open-source and freeware radio communications software.

One example of this is CHIRP, a Windows/Linux/MacOSX program that can program ICOM D-STAR radios.

CHIRP is a cross-platform, cross-radio programming tool.
It works on Windows and Linux (and soon, MacOSX). It can program all of the ICOM D-STAR (or D-STAR-capable) radios and exchange data between them.

As from version 0.1.9 CHIRP also supports limited operation with the Icom ID-RP* D-STAR DV and DD repeaters.

CHIRP
http://chirp.danplanet.com/wiki/

CHIRP Beginners Guide
http://chirp.danplanet.com/wiki/BeginnersGuide