A very impressive shareware Win95 editor for the 2120-VGS, RP-21D, JM-150, RP-20, RP-12,
RP-10, and Valve-Fx. File links to ftp.digitech.com don't work but you can find them all
here. The RPEdit software is also available for download at the
Harmony Central software archive.
Mac & PC universal editor / librarian from Mark Of The Unicorn
with support for 216 different midi devices including Digitech DSP-128, DSP-128 Plus, DHP-55,
PMC10, Studio 5000. Also includes a global snapshot feature to save your entire studio environment.