Todoist is my go to To Do List app for the last 6 months or so (at time of writing I am on 146 days useage) and I find it awesome.
Its easy to use either on the desktop or my phone, and it helps me make sure I have done enough awesoming for the day.
It has a very clean and easy to use design, just what you need in a task management tool. It can simply integrate with Dropbox, IFTTT and Slack.
It is free to use, although I did upgrade to the paid version as I loved it that much and like to use some of the advanced features. My work team however do get by with the free version, so depending on your need for it there is probably no need to splash out.
Find Todoist here and see what you think.
