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.
edX - Best Courses. Top Institutions. Learn anytime, anywhere.
WhiteSource - Find & fix security and compliance issues in open source libraries in real-time.
Geocities Site Builder - Share your abomination with the world
Snyk - Snyk helps you use open source and stay secure. Continuously find and fix vulnerabilities for npm, Maven, NuGet, RubyGems, PyPI and much more.
Treehouse - Treehouse is an award-winning online platform that teaches people how to code.