GitHub Repository Size - Browser extension to show file and repo size in GitHub
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Charte - Free online interactive charts for non-techies
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Charts Factory - Create simple charts super fast and for free!
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.