Cardstack opens the doors for stand-alone, private Blockchain applications for any business type. From decentralized video security monitoring systems, to tax and business accounting files retained on a public ledger for security, Cardstack is your Go-To custom application solution. No matter what you need to use the Ethereum Blockchain for, or what kind of custom app you need, Cardstack has you covered.
I have just published an article about this project here: https://steemit.com/internet/@jackandrew/cardstack-easy-blockchain-upgrades-anyone-can-add-to-their-business