OmniFocus

To-Do List/GTD app for MacOs X from OmniGroup https://www.omnigroup.com/omnifocus/

OmniFocus is powerful task management software for busy professionals. With tools to help tame the chaos, you can focus on the right tasks at the right time.... More to do than you can keep in your head? OmniFocus makes it simple to capture tasks from anywhere. And because it’s deeply integrated with Apple devices, OmniFocus becomes a seamless part of your workflow.