JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
PHP - A popular general-purpose scripting language that is especially suited to web development
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.