Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber

Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.

Asciidoctor - In the spirit of free software, everyone is encouraged to help improve this project.

PicMonkey - PicMonkey is a feature-rich online photo editor that works right in your browser; no downloads...

pandoc - Pandoc is a Haskell library for converting from one markup format to another, and a command-line...

Piktochart - Piktochart for Business Storytelling