SkyTouch is a cloud-based hotel management platform suited for hotels of virtually any size or type, featuring an easy-to-use property management system (PMS), along with a rate management system to help optimize revenue, and tools for distribution management with two-way connectivity between booking engines

Cassandra is a free and open-source, distributed, wide-column store, NoSQL database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure.