"Grails is a dynamic web-application framework built in Java and Groovy, leveraging best of breed APIs from the Java EE sphere including Spring, Hibernate and SiteMesh". This release features content negociation, REST and JNDI support. Worth checking if you're developing a website on the Java platform.

Graeme Rocher announced on his blog the release of Grails 0.6 with Rich Conversation Support thanks to the integration with Spring Webflow. This brings Seam-like rich conversations to Grails.