Sleek
Sleek is a free, open-source notes and writing app for Windows, macOS and Linux. Todo.txt manager for Linux, Windows and Mac, free and open-source (FOSS). It has 2,041 GitHub stars and is released under the MIT license. Its source code is on GitHub at ransome1/sleek.
- Linux
- macOS
- Windows
- BSD
- Notes & writing
- Actively maintained
About Sleek
sleek is an open-source (FOSS) todo manager based on the todo.txt syntax. 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.
Install Sleek
Package names found in the project's README. Each links to its package page so you can check the publisher first.
flatpak install flathub com.github.ransome1.sleekbrew install --cask sleek-appsnap install sleekAUR (Arch Linux)
Similar apps
More open-source note-taking and writing apps
AppFlowy
AppFlowy-IO/AppFlowy
Bring projects, wikis, and teams together with AI.
OfficialNotes & writingWindowsmacOSLinuxAFFiNE
toeverything/AFFiNE
There can be more than Notion and Miro. AFFiNE(pronounced [ə‘fain]) is a next-gen knowledge base that brings planning, sorting and creating all together.
OfficialNotes & writingWindowsmacOSLinuxMarktext
marktext/marktext
A simple and elegant markdown editor, available for Linux, macOS and Windows.
Notes & writingWindowsmacOSLinuxJoplin
laurent22/joplin
Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS.
OfficialNotes & writingWindowsmacOSLinuxSiYuan
siyuan-note/siyuan
An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together 开源、隐私优先、自托管的知识工作空间，让人与智能体在此协作.
OfficialNotes & writingWindowsmacOSLinuxLogseq
logseq/logseq
A privacy-first, open-source platform for knowledge management and collaboration.
OfficialNotes & writingWindowsmacOSLinux
What is Sleek?
Sleek is a free, open-source notes and writing app for Windows, macOS and Linux. Todo.txt manager for Linux, Windows and Mac, free and open-source (FOSS). It has 2,041 GitHub stars and is released under the MIT license. Its source code is on GitHub at ransome1/sleek.
Is Sleek free and open source?
Yes. Sleek's source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.
How do I install Sleek?
Flathub: flatpak install flathub com.github.ransome1.sleek, Homebrew: brew install --cask sleek-app, Snap: snap install sleek and the AUR package sleek. The commands are on this page. Installers are also on its GitHub Releases page (latest: v2.0.29).
Is Sleek still maintained?
The repository's most recent commit was on Sep 11, 2026. appsgit only lists apps whose repository had a commit in the last six months.