ERP, CRM (with sales support), and integrated DMS

Question

I am searching for Windows software with the following capabilities:

• CRM (addresses, contacts, sales support, etc.)
• ERP (sales, purchasing, article management, support for many warehouses, support for online shop / offline store, custom reports (invoices/reminder/etc.))
• Integrated DMS
• And all this in German language (German jurisdiction)
• Not more expensive than 500 EUR (a demo version for testing would be great)

Is there such a thing?

Update: I found meanwhile 2 software. I give you later pros and contras.

• Addware Warenwirtschaft
• Lexware Warenwirtschaft Pro

Answer 1

You can check Compiere with Adempiere (DMS).

They won't cost you anything for the community version, but I must tell you setting this up is not an easy task, you will have to read a lot the documentation and be prepared for some time testing and fully understanding all the process flows.

It has several language packs including German.