Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
My Daily Planner - Organize your day with pen & paper. Free printable template.
7todos - A task board for indie hackers
The Ultimate Productivity Stack - Curated directory of tools to supercharge your productivity
TaskPaper - Plain text to-do lists for Mac
The Best Life Planner 2018 - Make your goals actually happen this year