JWt (pronounced "jay-witty") is an open-source widget-centric web application framework for the Java programming language developed by . It has an API that uses established GUI application development patterns. The programming model is component-based and event-driven, similar to Swing. The goal of the library is to benefit from the stateful component model used in desktop applications APIs, applied to web development, instead of the traditional model–view–controller (MVC) model. Rather than using MVC at the level of a page, MVC is pushed to the level of individual components.