2Do lets you take a completely different approach to managing your tasks. With its extremely simple-to-use interface.

Assembla is the leading provider for SVN and Perforce hosting and has task management features built into it's platform.

Checkvist helps you create and share online outlines, project plans, online checklists, and task lists.

fluxday is a user-friendly, free & opensource task & productivity management tool for growing startups.

Google Tasks is the task list functionality provided by Google.

Insightly is an online CRM providing cloud-based customer relationship management (CRM) and project management tools for small and medium size businesses.

Asana is a web and mobile application designed to help teams track their work.

Basecamp is a project management web app.

Edraw MindMaster is a mind mapping software for organizing your ideas and plans.

FreeMind is a free and opensource mind mapping application written in Java.

GTasks is a simple and efficient todo or task management app with Google synchronization.

Jira is a proprietary issue tracking product, developed by Atlassian.