Tasks.txt is a native Mac task manager whose entire database is one plain-text file: no projects, no due-date fields, no account, just lines of text you can grep, diff, and drop into version control like source code. It was built by a developer who kept abandoning Jira, Trello, and Todoist to go back to a scratch file in a text editor — so this is that habit, given a real keyboard-first app around it. Free, with your data staying on-device; paid sync is promised later.