It was bound to happen, the minute I announced the Wicket integration, I've received a few emails describing integrations with other frameworks (like Tapestry). I've created a wiki page to list all frameworks integrating Bean Validation and a pointer to their documentation. Go ahead and fill it up with any active integration you are aware of. The page is here.
AeroGear Arquillian Bean Validation Byteman CDI Ceylon Discussions Eclipse Elasticsearch Events Hibernate OGM Hibernate ORM Hibernate Search Hibernate Shards Hibernate Validator Infinispan JBoss AS JBoss Asylum JBoss Forge JBoss Tools JPA JSF Java EE Off topic PicketLink Releases Rich Faces Seam Weld WildFly