Notion Pack - All the freelance docs you need, as Notion templates.
Nifty - Manage projects, work, and communications in one place.
Notion Pages - Discover new, productive Notion templates
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Entrepreneur OS - 100+ components prebuilt in the ultimate Notion template
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.