Jenkins is a simple, free and open-source Continuous Integration tool (CI), which is one of the most popular application development practices in recent times. Jenkins is widely used for building, deploying and automating any project, providing hundreds of different plugins. It supports version control tools, including AccuRev, Subversion, Git, CVS, Perforce, ClearCase, Mercurial, and RTC, and can execute Apache Ant, Apache Maven, and sbt based projects as well as arbitrary shell scripts.