sleek is an open-source cross-platform todo manager based on the todo.txt syntax

Danie
Screen split into three vertical panes. Largest one taking up just over half the screen on the right lists various todo items with checkboxes next to each, and they are grouped under headings A, B, and C. To left is a pane showing filters for priority A, B or C, projects with label names, and contexts, due date, etc. On the far left is a narrow column for tab management with a +, filter, etc.

Stripped down to only the most necessary features, and with a clean and simple interface, sleek aims to help you focus on getting things done.

All classic todo.txt attributes are supported and enhanced by additional features. Creating todos is straightforward, and tag-based filtering in tandem with highly customisable grouping and smart full-text search allows for rapid information retrieval. Completed todos can be hidden or archived into separate done.txt files. Easy integration with other todo.txt apps is facilitated by continuously scanning todo.txt files for changes.

sleek is available for Windows, macOS and Linux (AUR, Snap and Flatpak), and in several languages.

See https://github.com/ransome1/sleek