Here's a few
https://blockgeeks.com/guides/blockchain-applications/
The applications are endless. There's even an altcoin that utilizes the blockchain for a gun ownership registry, that (in theory) would know who owns a particular firearm, where it is and if it was fired.
https://cointelegraph.com/news/crowd...cation-system-
https://bitcoinmagazine.com/articles...-family-safer/
Anything that requires a smart contract between 2 parties, or anything that requires a ledger of any kind can use blockchain technology. It's fascinating.