OwnerRez is a robust Property Management System (PMS) designed for vacation rental owners and property managers. It provides an all-in-one platform that handles various operational tasks such as booking management, guest communication, invoicing, and reporting. It has an extensive range of integrations with popular Online Travel Agencies (OTAs) like Airbnb, Booking.com, Vrbo, and others, enabling easy synchronization of bookings and calendars across multiple platforms.

Apache Kafka is a distributed event store and stream-processing platform. It is an open-source system developed by the Apache Software Foundation written in Java and Scala. The project aims to provide a unified, high-throughput, low-latency platform for handling real-time data feeds. Kafka can connect to external systems (for data import/export) via Kafka Connect, and provides the Kafka Streams libraries for stream processing applications.