ClickUp

Click-up has pretty much everything from calendars, to do lists, docs, folders and more. The main purpose of this is actually just a to-do list, but it comes with lots of other features that integrate within each other. And for the most part it's free! The only downside is that it has too many features - this can be overwhelming at times, especially when all you want is a simple list.

ClickUp makes the workday more productive, it's simple. One app that is your everything: Tasks, Docs, Goals, and Chat.