Hoya is basically running HBase on YARN. It is currently hosted on Github, but there are plans to move it to the Apache Foundation.

Hoya creates HBase clusters on top of YARN. It does this with a client application called Hoya client; this application creates the persistent configuration files, sets up the HBase cluster XML files, and then asks YARN to create an ApplicationMaster, which is the Hoya AM here.

For more information, refer to https://github.com/hortonworks/hoya, http://hortonworks.com/blog/introducing-hoya-hbase-on-yarn/ and http://hortonworks.com/blog/hoya-hbase-on-yarn-application-architecture/.