JBuilder is a software development tool designed for creating Java applications. It provides a visual interface that allows developers to design user interfaces and manage application components easily. With features like code generation and debugging support, JBuilder streamlines the development process for Java programmers. Originally developed by Borland, JBuilder has evolved over the years to support various Java technologies, including JavaServer Pages and Enterprise JavaBeans. It is particularly useful for building enterprise-level applications, offering tools for database connectivity and web services integration, making it a popular choice among Java developers.