The Glance project provides services for discovering, registering, and retrieving virtual machine images. Glance has a RESTful API that allows querying of VM image metadata as well as retrieval of the actual image.
tacker: specifications a servicevm/device life cycle manager. See https://wiki.openstack.org/wiki/ServiceVM
Horizon is a Django-based project aimed at providing a complete OpenStack Dashboard along with an extensible framework for building new dashboards from reusable components.