Maybe ERPNext could do it. It has many modules, including CRM! https://erpnext.com/

going to be the party pooper here, but GTK means Gnu Tool Kit. It’s a framework to build gui applicatiion.

Thank you!

Omg that was quick, thank you! Please make an issue in the repo so I won’t forgot to add it to installation.md

Yes, it’s stored as a binary object instead of markdown because of that! The changes I made to migrate the whole backend from ReDB to Sqlite is still very new, thanks for reminding me to mention it in the docs!