Wikipedia
WebObjects is a Java web application server and a server-based web application framework originally developed by Apple Inc. As of 2009 the software has been independently maintained by a volunteer community.
WebObject's hallmark features are its object-orientation, database connectivity, and prototyping tools. Applications created with WebObjects can be deployed as web sites, Java Web Start desktop applications, and/or standards-based web services.
The deployment runtime is pure Java, allowing developers to deploy WebObjects applications on platforms that supports Java. One can use the included WebObjects Java SE application server or deploy on third-party Java EE application servers such as JBoss, Apache Tomcat, WebLogic Server or IBM WebSphere.