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 2016: Java EE 7 Workshops: Bootstrap, Effective, Architectures, April, 4th-6th, Munich's Airport
On demand workshops: Java EE 7 Bootstrap, Effective Java EE 7 and NEW: Java EE 7 Testing are available for streaming