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 - Simple, flexible, trustworthy CI/CD tools. Join hundreds of thousands who define tests and deployments in minutes, then scale up simply with parallel or multi-environment builds using Travis CI’s precision syntax—all with the developer in mind.
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Rust - A safe, concurrent, practical language