Open source. Open possibilities.

Zest is a feature-rich task management application built with Flutter, offering powerful organization tools, productivity statistics, and a modern Material You design.

Tisty is a local-first, open-source productivity tool for Windows and macOS that combines notes, documents, and task management. It stores all data as plain Markdown files on the user's disk, ensuring privacy with no accounts, subscriptions, or telemetry. Features include an Eisenhower matrix for prioritization, natural language date parsing, and MCP integration for AI assistants.

Vikunja is a self-hosted task manager designed to give users full ownership of their data.

Super Productivity is an advanced open-source todo list application featuring integrated timeboxing, time tracking, and extensive third-party task integrations.

Taskbook is a lightweight command-line task and note manager that organizes items into boards with timeline views, priority levels, search, filtering, and archive/restore. Data is stored locally in JSON files with atomic writes for safety.

Fold is a calm, offline-resilient CalDAV todo client. It stores tasks as standard VTODOs on your own server, features quick add parsing, special handling for Health and Groceries lists, keyboard-first navigation, PWA support, and zero database—credentials live in an encrypted cookie only.