Favourite:
Any business Wikipedia like I pointed here out:
I’m also fine with doing notes on the normal issues. In that case I don’t need a tool.
(Jira specifically sadly looses data when parallel editing on issue descriptions. The last one saving overwrites all changes. Also therefore I often use Confluence.)
Least:
Any which separates planing, noting, reporting and worsens the collaboration with developers and project managers .
The typical form of steps with actions and expect results which are hard to change on the spot.