Zim

Zim is a powerful note-taking program that draws inspiration from wiki servers. It offers a wide range of features, including text formatting, image insertion, calendars, checkboxes and to-do lists. Zim also allows you to create equations using LaTeX.

Zim's user interface is a bit cluttered, but after a few tries it's easy to learn how to use.

Zim is an ideal tool for anyone who needs to create and organize notes. It's powerful, versatile, and available for free.

Here are a few other features of Zim:

- Support for multiple windows and bookmarks

- Ability to connect to external sources such as Google Docs or Dropbox

- Sync notes between different devices

- Ability to export notes to different formats such as PDF, HTML, or Markdown

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