SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
Prettier - An opinionated code formatter
edX - Best Courses. Top Institutions. Learn anytime, anywhere.
ESLint - The fully pluggable JavaScript code quality tool
Geocities Site Builder - Share your abomination with the world
RuboCop - A Ruby static code analyzer, based on the community Ruby style guide.