Electronic queue, what software to use?

Question

CRM

Interested in opensource crm with the ability to register visitors for a certain time (available-busy time, setting the schedule of working days ...) It is also necessary for registered clients to be able to upload and view files (ideally, an online .docx editor). This is the base that is needed, or to make it easy to finish such a thing. Actually, from a bunch of options, you need to choose the one that we will modify to suit our needs. Or maybe a wordpress plugin.

Answer 1

The question is off topic. The electronic queue has nothing to do with CRM.