Emercoin is just one of those currencies, as alongside with being based on the original blockchain technology in accordance with how Bitcoin was made, it offers additional features to the already familiar system.
In addition to representing a fine blockchain structure that makes up for a combination of old and new blockchain technology, Emercoin took the best out of Bitcoin prior to being launched as an ICO approximately 5 years ago, while creating an ecosystem for distributed blockchain services that came with dozens of different features.