Managing millions of tasks, Todoist is an online task management app and todo list. It has Web, iPhone, Android, Chrome, Firefox, Outlook flavors (and more!).
Carry content review decisions into the publishing calendar.
Your publisher can see the review decision on the scheduled entry, with a link to the approval task before taking action.
Flag undecided campaign reviews before launch.
Your marketing lead sees the overdue campaign review in team chat and can open the original task before launch.