In concert with the latest Oracle Enterprise Manager 12c Release 4, the Oracle Enterprise Manager team has released Version 2.0 of the Extensibility Exchange.
A catalog for anything that extends Oracle Enterprise Manager beyond its out-of-the-box download, the Extensibility Exchange allows you to search or browse for plug-ins, connectors, deployment procedures, best practices, templates and other entities.
The new version has an optimized viewing experience on any type of device (PC, tablet, phone) and in general has more info associated with each entity in the catalog. Upcoming improvements are planned to make it more of a "community" site as well. Read more about it at this blog post.
You can also check out EEv2 now by going to www.oracle.com/goto/emextensibility.