On the way: Databases, bare metal management, messaging and Hadoop
There are a number of projects that are still incubating, which means they are in development and not yet full-fledged components of OpenStack. These include Trove, which is a MySQL database as a service (think of this as an equivalent to AWS's Relational Database Service (RDS). Another is Sahara (formerly named Savanah) which is meant to allow OpenStack software to control Hadoop clusters. Ironic is a project that will allow OpenStack to manage bare metal servers. And Macaroni is a messaging service.
These projects will continue to be developed by the OpenStack community and will most likely be integrated more fully into the project in the coming releases.