pandoc - Pandoc is a Haskell library for converting from one markup format to another, and a command-line...
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
GitHub Flavored Markdown - GitHub uses "GitHub Flavored Markdown," or GFM, across the site--in issues, comments, and...
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.
Asciidoctor - In the spirit of free software, everyone is encouraged to help improve this project.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.