Boostnote is an Open source note-taking app for programmers, and desktop app has already spread to more than 190 countries.
The outline of Boostnote is here.
Free
· Anywhere you can use. (Mac, Windows, Linux, iOS and Android app)
· Markdown format.
· No internet required
· No Registration
With Boostnote, you can easily fill out and view the information you need.
· While studying, record notes instantly, you can quickly see notes that you made later
· Since markdown notation can be used, it is possible to organize various kinds of information such as source code insertion, headline, emphasis, strikethrough, folding, list, bold, italics, link, check box, quotation, horizontal line, image embedding, table and more.