Crest is a RESTful CRUD server built using Python on top of Cassandra. It is designed to be easily extensible and makes some assumptions about how you'll want to store your data in Cassandra.
Project Clearwater is an open-source IMS core, developed by Metaswitch Networks and released under the GNU GPLv3. You can find more information about it on our website or our wiki.
In Clearwater, Crest is used to power the Homer and Homestead components. See the documentation for these projects for more details. The common features and instructions for both are listed in this file.