JDeveloper is an Integrated Development Environment (IDE) developed by Oracle Corporation for building Java-based applications and web services. It provides a comprehensive set of tools, features, and frameworks for developing, testing, and deploying enterprise-class applications. JDeveloper supports a wide range of technologies, including Java EE, XML, SQL/PLSQL, HTML, CSS, and JavaScript. Its features include visual editor, code editor, debugger, profiler, and support for version control systems. It is a valuable skill for developers working on the Oracle technology stack.