What solutions exist for organizing a corporate sharing system?

Question

Google

Are there solutions (not necessarily free) for organizing your own collaboration system within the company, which would combine:
- mail;
- calendar;
- file storage with the possibility of sharing;
- pdf/jpg viewer;
- editor of office documents.
Preferably with Russian language support.
In general, their Google Mail + Drive + Docs + Calendar.
I tried OwnCloud, but it doesn't know how to edit documents, it's slow and not very stable.
I understand that the task is not trivial, but perhaps someone already has experience working with integrator companies that have already implemented similar solutions of their own design somewhere.

Answer 1

TeamLab
is a multifunctional online office that includes CRM, project collaboration tools, a Gantt chart, a mail aggregator, and next-generation online document editors written in HTML5. The TeamLab system is based on ASP.NET technology. The product is presented in 18 languages ​​......
No advertising itself enjoyed

Answer 2

For those who are interested, I myself found proposals to create a similar one on a bunch of Microsoft Sharepoint + Exchange + Lync.
But I'm leaning towards Zimbra myself.