What are opensource solutions for electronic document management?

Question

linux

You need something like google docs so that you can view documents, change them, edit them (not necessary, but it would be a plus). So far, they want to implement openkm, but it looks like it is loaded, both in terms of interface and technology.
Maybe there are some other solutions, analogues are good, modern?
On the centos server if that.

Answer 1

OwnCloud

Answer 2

latex+git

Answer 3

I didn't really like www.alfresco.com at first glance, but people praise it.

Answer 4

Citeck EcoS