Trello

The advantage behind Trello is that it allows you to create and collaborate on projects with your friends or work colleagues. It shows you the progress of your projects and tasks that have been completed. You can have an overview of the project’s progress and message your collaborators.
 
All projects are organized into boards and there are multiple customization options for workflows, as well as tools for assigning tasks. Comments can be posted and media files can be uploaded onto projects. Moreover, the app comes with tools for adding checklists and attaching files from Google Drive or Dropbox. You can archive lists and projects that you’ve completed and the app allows you to set notifications and reminders.