I swapped a few tweets with the developer, Adam Dudczak (maneo on Twitter) back in 2013.  Looking at his LinkedIn profile, it seems he left that job in early 2014.

If you find out more about the status of VTL, I'd love to hear about it.

Ben Brumfield
http://fromthepage.com/
http://manuscripttranscription.blogspot.com/

On Thu, Oct 8, 2015 at 11:35 AM, Federico Leva (Nemo) <nemowiki@gmail.com> wrote:
Apparently, this rather mysterious project allows some select libraries to import a special flavour of DjVu into a system for manual transcription (and OCR training?).
https://confluence.man.poznan.pl/community/display/WLT/Introduction+to+Virtual+Transcription+Laboratory
Found via http://succeed-project.eu/wiki/index.php/Cutouts

Nemo

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