Hi Ezequiel,
As far as I can remember from previous discussion in this mailing
list, HyperGraphDB is used in products developed by SpeakFreely
company (http://www.speakfreely.org/). But I'm not sure what was
the share of HyperGraphDB in theirs software.
Please look into old messages in the group for more details. And reach out Peter (speakf...@gmail.com).
Best regards,
Yury