Tests based on cactus and junit for testing JSF applications while they are running. Includes help with performance analysis. Runs inside the container, which means full access to the system include FacesContext. This enables easier debugging.

SEAM is primarily designed to make EJB3 and JSF, two new J2EE technologies, work well together. Some people argue that an architecture based on Spring is preferable.

ZK is an event-driven, XUL-based, AJAX-embedded, all Java framework to enable rich user interfaces for Web applications. With ZK, you represent and manipulate RIA in XUL/HTML components all at server, as simple as you did for years in desktop apps. JBOSS recently (summar, 2007) announced the ability of Seam to integrate with ZK.

Facelets is a view technology that focuses on building JSF component trees.