Here is a 1-paragraph summary of the text: OmniFocus is a powerful to-do list app that helps users manage their tasks and projects using the Getting Things Done (GTD) methodology. GTD aims to clear out the mind by capturing everything that needs to be done, clarifying ideas, organizing tasks, reflecting on work, and engaging in actions. OmniFocus offers various features such as projects, contexts, perspectives, and custom views to help users organize their tasks and stay productive. The app can be integrated with other apps and services using Zapier, allowing users to capture tasks from emails, documents, notes, and more. With its robust features and customization options, OmniFocus is a popular tool among individuals seeking to boost their productivity and achieve their goals.