Welcome to the homepage of the Zettelkasten (slip box) for your computer. This program is based on the working principle of Niklas Luhmann's famous Zettelkasten.
Cost / License
- Free
- Open Source (GPL-3.0)
Platforms
- Mac
- Windows
- Linux




zk is described as 'Plain text note-taking assistant meant for use alongside a separate text editor program' and is an app in the education & reference category. There are more than 25 alternatives to zk for a variety of platforms, including Mac, Linux, Windows, Self-Hosted and Android apps. The best zk alternative is Obsidian, which is free. Other great apps like zk are Logseq, Notesnook, Zettlr and Zim.
Welcome to the homepage of the Zettelkasten (slip box) for your computer. This program is based on the working principle of Niklas Luhmann's famous Zettelkasten.




Terminal-based, hyper-fast, CRDT-backed, collaborative note-taking tool Simple, powerful, extremely fast search. fzn is local-first; remote-second. It acts on local in-memory data, meaning no expensive I/O and native speeds.



A fast, private Markdown notes app for thinking, writing, and linking ideas for your Mac.



