Sounds like it's presenting a new C++-based Qt library management interface/database system and then simply using calibre for (optional) conversions to different formats (for now).
If it fills a need and doesn't violate calibre's GPL (which it doesn't sound like it does) then more power to them. Options are always good.
Last edited by DiapDealer; 09-23-2013 at 03:12 PM.
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