Red Hat Developer Studio is a set of eclipse-based development tools that are pre-configured for JBoss Enterprise Middleware Platforms and Red Hat Enterprise Linux. Developers are not required to use Red Hat Developer Studio to develop on JBoss Enterprise Middleware and/or Red Hat Linux. But, many find these pre-configured tools offer significant time-savings and value, making them more productive and speeding time to deployment. Red Hat Developer Studio will be available as a new subscription offering soon.
Use this studio to build java and ajax based application.
Download Red Hat Developer Studio
You can download Windows or Linux version here (530Mb).