1. Keystone project: It provides API client authentication, service discovery, and distributed multi-tenant authorization by implementing OpenStack’s Identity API. 2. Glance project: Stores and retrieves disk images Virtual machine templates. Support Raw, QCOW, VMDK, VHD, and ISO. 3. Nova project: Schedules, and manages the life cycle of virtual machines. Native OpenStack API and Amazon EC2 compatible API. 4. Neutron project: It is the networking component of OpenStack. It relies on Keystone for authentication and authorization of all API requests. 5. Cinder project: It provides block storage for virtual machines. It's designed to present storage resources to end users that can be consumed by the OpenStack Compute Project (Nova).