Branch Plugin * - Analyzes maintenance and feature branches in the context of your master branch
Developer Plugin * - Adds in-IDE notifications of SonarQube project Quality Gate status changes, new analysis, and new issues.
GitHub Plugin - Analyzes pull requests, and notates issues as comments.
GitLab Plugin - Analyzes pull requests, and notates issues as comments.
Google Analytics - Adds the Google Analytics tracking script to the SonarQube web application.
Pitest - Integrates with PIT, which is a mutation testing tool for Java.
Sonargraph - Integrates results from Sonargraph, which has a coincidentally similar name.
SVG Badges - Provides additional Quality Gate status and metric value badges. From SonarQube 7.1 such badges are available from the platform without a plugin.