I see all the people here talking about JIRA or/and Bitbucket server. However Confulence is not mentioned that much. I think the hardest product to replace is Confluence, especially on-prem, when you need your data inside your firewall. There are many bad things in Confluence: 1. search is completely broken since several versions 2. the editor is not very good 3. it's just too slow Hoever, there is 1 very good featur…
The terrible secret of Confluence search is that it defaults to OR between terms (which I think is a Lucene default that it inherited, even if it doesn't use Lucene anymore).
Once I started remembering to add AND between my search terms my searches became much more relevant. It's silly that I have to, of course, but I'm glad to get better search results.