Hey Entrepreneur,
I am from MuK IT we are integrating and customizing an ERP-System called Odoo.
We also made a DMS-DocumentManagementSystem, which you can use for free!
If you want to test our software, here is a Demo,
acc: demo
pw: demo
there are modules like POS-Point of sale, Invoicing, Projectmanagement, Inventory, CRM and so on.
If you need any further infos, write me here or an email: manuel@mukit.at