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.

Taskwall - Remote teams and Individuals use Taskwall to stay organized with their projects, tasks, and team in a powerful application that adapts to the individual needs.

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.

Instakin - Marketplace for immigrants to manage tasks back home

Basecamp - A simple and elegant project management system.

Notion Pack - All the freelance docs you need, as Notion templates.