Sorry for the cross-posting but I think this might be interesting to both lists.

Just come across the following post from Microchip Forum:
http://forum.microchip.com/tm.aspx?m=135666

Windows GUI is also provided (no source).
You can download both the firmware and the GUI from ingenia:
http://www.ingenia-cat.com/index.php?lang=en

So we have dsPIC bootloader from Daniel Chia, TinyBootloader and now the
ingenia.

Daniel Chia's bootloader:
http://www.beaglerobotics.com/community

Tiny PIC Bootloader:
http://www.etc.ugal.ro/cchiculita/software/picbootloader.htm

Regards,
Xiaofan

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