Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
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.
Google Cloud Functions - A serverless platform for building event-based microservices.
CodeClimate - Code Climate provides automated code review for your apps, letting you fix quality and security issues before they hit production. We check every commit, branch and pull request for changes in quality and potential vulnerabilities.