Eclipse Vert.x is a polyglot event-driven application framework that runs on the Java Virtual Machine.

[2][3] Similar environments written in other programming languages include Node.js for JavaScript, Twisted for Python, Perl Object Environment for Perl, libevent for C, reactPHP and amphp for PHP and EventMachine for Ruby.

In December 2012, after he left their employment, VMware served legal papers on Tim Fox to take control of the Vert.x trademark, domain name, blog, GitHub account, and Google Group from the Vert.x community[5][6] After much discussion with other parties, in January 2013, VMware was persuaded that it would be in the best interests of the Vert.x community to move the project and associated IP to the Eclipse Foundation, a neutral legal entity.

[10] The application framework includes these features: A web server serving "Hello from Vert.x!"

could be written in Java: And in JavaScript: Both cases will result in a web server serving content in a highly scalable manner.