Taskbook - Like Trello but for the Terminal
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Todorant - Tricks yourself into craving completing tasks
Do by InVision - The world's most versatile to-do app UI kit for PS & Sketch
TickTick - TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.
Klaus Sinani - Software & Computer Engineer