trello

I've been a Trello user and fan for a long time. The intuitive interface provides a powerful platform for managing any project in a Kanban or Scrum methodology.

If you work with the Markdown markup language, it's only a matter of time before you need to escape the markdown formatting characters. For instance, pasting source code into Trello cards requires the text to be escaped or else certain characters of the source code will be interpreted as markdown.