An open source cryptocurrency block explorer
Conceal Explorer - CCX Block Explorer
Block explorer for Bulwark Cryptocurrency
Ethereum Block Explorer (ETHExplorer V2) - Realtime Price Ticker, Shapeshift.io Integration, etc. (Project is currently not under active development, if you have a bug fix, please open a PR) My current project can be found at https://github.com/carsenk/denarius (D a better cryptocurrency than ETH)
Block explorer for Karbowanec CryptoNote based cryptocurrency.
A Blockchain Explorer for ARK using Vue.js and Tailwind CSS.
A Rivine explorer tracking all blockchain info in a Redis DB.
Decred block explorer, with packages and apps for data collection and storage. Written in Go.