InvenTree, the open source inventory system for parts, stock and bills of materials, ready the moment it boots.
InvenTree is an open source inventory management system built for manufacturing and physical-product businesses. It keeps a structured catalogue of the parts a business buys and makes, tracks how much of each is held and where, and records the bills of materials that define which components go into which assemblies. Purchase orders, sales orders and build orders sit on top of that, so stock figures move as work happens rather than being maintained by hand. Everything the web interface can do is also available through a complete REST API, and a documented plugin interface allows the system to be extended without forking it.
The image arrives with the application server, background worker, PostgreSQL, Redis and an HTTPS reverse proxy already configured, so a working inventory system is available minutes after launch. No administrator account and no shared secret ship in it: the admin password, database password, Django secret key and TLS certificate are all generated on each instance's first boot and written to a root-only file, and nothing serves until that completes. Paired with a step by step deployment guide and 24/7 cloudimg support.
Real screenshots taken while testing this image against its deployment guide.