Pricing:
Free forever for unlimited personal boards, cards and lists – with 10 team boards. Paid plans start at $9.99 per user per month. 

Todoist is a simple but powerful tool that lets you create powerful, interactive to-do lists. To-do items can be assigned priority levels, assigned to people in your team and flagged – with customisable reminders (although these are a premium feature.) Actionable items can also be categorised into different projects, making a simple, easily understandable structure where each ‘list’ has a title (project name) and a series of actions. This all makes it an extremely flexible, customisable tool to get work done.