StackEdit

Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.

Atom

At GitHub, we’re building the text editor we’ve always wanted: hackable to the core, but approachable on the first day without ever touching a config file. We can’t wait to see what you build with it.

FocusWriter

FocusWriter is a fullscreen, distraction-free word processor designed to immerse you as much as…

Joplin

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.

Lenote

Lenote is a simple, distraction-free notetaking app that lets you capture and organize thoughts more productively.

Scrivener

Scrivener is a content-generation tool for composing and structuring documents.

WriteMonkey

Software for full screen distraction free creative writing. No whistles and bells, just empty screen, you and your words. WriteMonkey is light, fast, and perfectly handy for those who enjoy the simplicity of a typewriter but live in modern times.