Tools for Bloggers
SEO Flow
SEO Flow is a plugin for the Wordpress website platform, that lets users search for common search terms put into Google, optimise their articles to rank well for those terms, and then track those rankings.
The UI is integrated into Wordpress, and is Scala transpiled to ScalaJS, and skinned with CSS to look very close to the Wordpress admin theme. The backend is in Scala.
The backend is designed to handle plenty of users at scale.