NetBeans is an open-source integrated development environment (IDE) primarily used for developing applications in Java. It provides tools for code editing, debugging, and project management, making it easier for developers to write and maintain their code. In addition to Java, NetBeans supports various programming languages, including PHP, HTML5, and C/C++. Its user-friendly interface and extensive plugin system allow developers to customize their workspace and enhance functionality, catering to different project needs and preferences.