Ask HN: Best app for keeping track of information as a manager?

I've recently been promoted from software engineer to manager of an 8 person department. I now have to lead projects, keep track of things discussed in meetings, and generally maintain some kind of record of what's going on with teams and individuals in the department.

Do you have a recommendation for software I could use for this? I already looked at Evernote, Asana, and Trello, but they seem to either be good for project management or organizing notes, but not both. Ideally, I'd like a kind of cross platform data store that lets me share information with my team, keep track of everything related to projects and meetings (agenda, decisions made, action items), and be easily organizable and searchable.

I'd really appreciate your thoughts and recommendations. Thanks!