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sleek vs topydo: catalog facts
sleek	topydo
Free Free and open source.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux	Command line
Tasks kept in plain todo.txt files you own Runs on Linux, Windows and macOS	Plain todo.txt file readable by other tools Due dates, dependencies and recurring tasks
Limited to what the todo.txt format can express	Terminal only, no graphical or mobile app Extended tags may not be understood by other todo.txt tools
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.