GTDNext Alternatives for Mac OS X

Todoist is a leading task management and to-do list application designed to help individuals and teams organize their tasks, projects, and goals across various devices. It offers powerful features for capturing, organizing, and completing tasks efficiently.

Task Coach is a free and open-source personal task manager designed to handle compound tasks and notes. It's a versatile tool for organizing your to-do list with support for subtasks, categories, and tracking time spent on tasks, making it suitable for both simple task management and more complex project organization.

fluxday is a free and open-source task and productivity management solution designed specifically for growing startups, focusing on streamlined task workflows and team accountability.

TaskPaper is a distinctive plain text based task management application designed for simplicity and flexibility. It leverages the power of outlines and plain text formatting to help users organize tasks, projects, and notes efficiently.

Moo.do is a collaborative task management and outlining tool designed to consolidate your work, notes, and tasks into a single, flexible interface.

Germ.io is a collaborative idea management and project planning tool that helps teams capture, refine, and transform initial concepts into structured and actionable project plans.