The introduction of Dataverse APIs has fostered the development of apps that are listed at http://dataverse.org/integrations
The apps below are open source, demonstrating how to use Dataverse APIs. Some of these apps (and others) are built on Client Libraries that are available for Dataverse APIs.
The Open Journal Systems (OJS) Dataverse Plugin adds data sharing and preservation to the OJS publication process.
Allows you to view, download, and upload files to and from a Dataverse dataset from an Open Science Framework (OSF) project: https://osf.io/getting-started/#dataverse