Astrid is described as 'At its core, Astrid is a open source todo list that helps you get stuff done. That's why Astrid makes it really easy to create lists of tasks, as well as set priority, set due dates, and times' and is a popular todo list manager in the office & productivity category. There are more than 100 alternatives to Astrid for a variety of platforms, including Windows, Web-based, Android, iPhone and Mac apps. The best Astrid alternative is Todoist, which is free. Other great apps like Astrid are Workflowy, TickTick, Habitica and Tasks.org.
Any.do is an award-winning app used by millions of individuals, families and teams to stay organized and get more done.
Any.do is the most popular SaaS alternative to Astrid.
The powerful, full-featured Personal Information Manager for Windows offering Email, Synchronization, Portability, Network support, Android and iOS versions.
MyLifeOrganized (MLO) is a personal task outliner and to-do list manager which will help you to organize your goals, projects and tasks into a tree.
Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists. It is designed for composite tasks, and also offers effort tracking, categories, notes and more.
Simple GTD application to manage your tasks and to-dos. Syncs with web server. Complete with the usual Inbox, Today, Next, Tomorrow, Scheduled and Someday "buckets" as most GTD programs have. You can also create Projects for tasks with multiple steps.
The smarter way to work Ayoa is an all-in-one online whiteboard where you can brainstorm ideas, work together and get things done.
Provides project and task organization for teams or individuals, featuring file sharing, commenting, offline access, reminders, deadline tracking, calendar integration, tagging, progress views, project sections, and home screen widget for urgent tasks and priorities.
Track your tasks and projects in a plain text file, todo.txt. A todo.txt is software and operating system agnostic; it's searchable, portable, lightweight and easily manipulated.
MyInfo is a personal information manager for Windows. It will help you capture, organize, edit and share ideas, documents, tasks, and web pages.
ColorNote is a simple notepad app. It give you a quick and simple notepad editing experience when you write notes, email, message, shopping lists and todo lists. ColorNote makes taking a note easier than any other notepad apps.
Clear is a colorful canvas for your thoughts, plans and goals. Here's what makes it uniquely fun and effective.
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Very usefull. Simple and modern interface. Very good sync. Multi Platform + Chrome widget. :-)