What's the best productivity tool for product managers?

I have multiple people that I have to follow up with and multiple features and stories that need development and iteration. Keeping track of it all is not easy, and I want to be more organized than using an ever more crowded note taking app.
Marco MarandizProduct Manager at HomeAway · Asked
7
Trello

Organize anything, together

Jack Dweck15Product Manager at Unroll.Me · Written
Trello is an excellent tool for keeping tasks and projects organized.
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