Aptana Jaxer, made obsolete by Node.js, is an open-source Ajax web server for building rich web pages and applications using a unified Ajax model wherein both client-side and server-side code can be written in JavaScript. Jaxer's server-side engine is based on Mozilla Gecko, the same browser engine that is used in Firefox. The Mozilla engine allows Jaxer to provide a server-side DOM in which a page may be manipulated during server-side processing using the techniques familiar to client-side programmers. Jaxer's server-side JavaScript APIs enable database access, file system access, network communications, user sessions and other functions typical of web application servers. Jaxer also provides for access to Java objects via the open source Direct Web Remoting project. Jaxer is now on GitHub.