Open-source alternatives to Things

Advanced todo app with timeboxing and tracking — Super Productivity is an advanced todo list app with integrated Timeboxing and time tracking capabilities. It also comes with integrations for Jira, GitLab, GitHub and Open Project.

↔ alternative to Todoist、TickTick、Things

GTD to-do app that surfaces your next action — Get tasks and ideas out of your head. A free GTD to-do app for desktop and mobile. Works offline, no account needed

↔ alternative to OmniFocus、Things、Todoist