Taskbook - Like Trello but for the Terminal
Focuster - Ditch your todo list for an intelligent scheduler
Taskwarrior - Taskwarrior is an ambitious project bringing sophisticated capabilities to a simple and elegant...
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Calcurse - Calcurse is a calendar and scheduling application for the command line.
dstask - Command line todo list with git sync