Open Source Hotel Management System

Hotel property management is sparse in open source, largely because the money is in the channel-manager and payment integrations that connect a property to booking sites, and those live behind commercial APIs no free project can fully replace. The systems here cover the core a small property actually runs on - reservations, room inventory, the front-desk calendar, and guest folios - self-hosted, so your booking history and guest records sit on hardware you own even where the outside distribution channels stay commercial.