NetBeans comes with a useful Maven Repository Viewer: .It also supports full text search for dependencies in all repositories. Also artifacts already installed in your local repository can be easily browsed. To open the view go to: Window -> Other -> Maven Repository Browser.
NEW workshop: Building HTML 5 Applications Without Frameworks, Full week in December 2016: from Java EE 7 Bootstrap, Effective, Architectures over Testing to Microservices
On demand workshops: Java EE 7: Bootstrap, Effective, Testing and Microservices available for streaming.