The best open source alternative to Microsoft To Do is Super Productivity. If that doesn't suit you, we've compiled a ranked list of other open source Microsoft To Do alternatives to help you find a suitable replacement. Other interesting open source alternatives to Microsoft To Do are: Vikunja and Donetick.
Microsoft To Do alternatives are mainly Task Management Tools but may also be Project & Work Management Tools or Time Tracking Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Microsoft To Do.
Open-source task manager combining time tracking, notes, and focus tools. No tracking, full privacy, offline-first. Perfect for developers and professionals.

Transform your productivity with a task manager built for deep work. Super Productivity combines task management, time tracking, and note-taking in one privacy-focused workspace that adapts to how you actually work.
Key features that set it apart:
Perfect for professionals who value privacy and control. No user accounts, no tracking, no vendor lock-in. Export your data anytime in JSON or CSV format. The extensible plugin system lets you customize workflows exactly how you need them.
Cross-platform sync via WebDAV and Dropbox keeps your tasks accessible across desktop, web, and mobile. Built-in procrastination helpers use CBT techniques to overcome mental blocks, while comprehensive keyboard shortcuts maximize efficiency for power users.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A powerful, open-source task management platform for teams and individuals, offering customizable workflows and seamless integration.

Vikunja is a versatile, open-source task management solution designed to boost productivity and streamline collaboration. Whether you're working solo or managing a team, Vikunja adapts to your unique needs.
Key benefits of Vikunja include:
Vikunja combines the simplicity of personal to-do lists with the power of enterprise project management tools. Its intuitive interface and feature-rich environment make it an ideal choice for individuals, small teams, and large organizations alike. Experience the freedom of open-source task management with Vikunja and take control of your productivity today.
Organize tasks and chores with intelligent scheduling, fair assignment, and collaboration features. Perfect for families and teams with smart notifications.

Smart task management that keeps individuals and families organized with intelligent scheduling and fair task distribution. Whether managing personal tasks or coordinating household chores, this tool provides robust assignment options and flexible scheduling.
Key features include:
Perfect for tablet installations in kitchens or offices, providing always-accessible task management for shared spaces. Open-source with privacy focus, offering web app, mobile apps, and self-hosted options.