Is there a solution for maintaining a knowledge base in an agency?

Question

Knowledge base

Colleagues!
I'm sure the market has already somehow solved this problem, I hope for your help Emoticon "smile"
Need a solution to create a "knowledge base" in the agency. Some kind of common system that will allow you to merge the collective experience and knowledge of colleagues in the industry, on specific clients and projects.
A place where you can send research with a brief description of what is interesting for us, presentations from conferences with key facts, just write short notes from the series "Company A launched activation B" ...
Basic requirements:
- Cloud and web, so that everyone has access , no platform restrictions;
- Friendly for not very tech savvy people. Those. solutions based on wiki or lotions to Redmine will not work:
- Cute appearance. It should be easy and pleasant to work with the service, otherwise they will “forget” to use it all the time;
- Tags (where without them);
- Pts good search;
- It is desirable to have your own data storage (to load the documents themselves there, and not links to a shared disk);
- Well, and for free, of course. Emoticon "smile"
Share, who solves this problem inside himself?
We tried to use Evernote with shared notebooks, but it did not take off ... If only because only the owner of the notebook can put tags on notes. And, it seems like, Evernote was going to die ...

Answer 1

wiki

Answer 2

Google Docs is obtained (also half measures), or if there is no differentiation of rights, then evernote web or onenote web. Evernote is friendlier IMHO interface.
And it is possible to simply create some kind of first screen on html on which there will be links, folders to Google Docs.