FocusWriter - FocusWriter is a fullscreen, distraction-free word processor designed to immerse you as much as...
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
GitHub Flavored Markdown - GitHub uses "GitHub Flavored Markdown," or GFM, across the site--in issues, comments, and...
iA Writer - Minimal Design, Maximum Focus
Texy! - Texy! is a lightweight markup language as well as converter of this format to XHTML, in a form of a...