UniSynth is a stand-alone Windows application managing MIDI hardware devices.
Version 1.0 ( Mar-14-2009 ) supports:

Korg DW8000 / EX8000 :
- full patch editing
- intialize, randomize and morph patches
- patch naming workaround
- access to undocumented parameters

Yamaha DX21 / DX27 / DX27S / DX100 :
- full memory editing including DX27/100 Rom mapping
- intialize, randomize and morph patches

You can download the pdf manual here.
The version 1.0 setup (including the above documents) is here.
The demo version is fully functional.

If you have any suggestion of wish to have UniSynth translated to your language, please feel free to send a mail to support@midimetric.com