Tools for large project planning?

What are your suggested tools for planning large projects?

I’m building something with lots of parts to it, including profile pages, leaderboards, admin dashboards and three levels of user permissions.

I can use Trello to track each discrete task that needs to be completed, but are there other tools I am unaware of that might help me visualise all of the various routes and internal links that the project requires?

Any other tips about managing a bigger project are welcome - this is my first ‘larger than an FCC project’ project so I’ll mostly be stumbling around like a fool for a while…