Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.

Smaller - Make your websites load faster

Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

Website Grader - Grade your website's strengths and weaknesses in seconds.

Kafka - Apache Kafka is publish-subscribe messaging rethought as a distributed commit log.

Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.