Litecoin was created in 2011 by a Google employee Charlie Lee. Currently, this cryptocurrency is one of the largest by market capitalization. Litecoin was created as one of the first forks of the Bitcoin blockchain. Also, it is safe to say that Litecoin is one of the first altcoins. While Bitcoin is based on SHA-256 algorithm, Litecoin utilizes a lighter scrypt algorithm.
The Dentacoin (DCN) token represents an extended version of an ERC-20 contract. The token is available with several exchange platforms. At the moment of writing, you can trade DCN against two fiat currencies (EUR and USD) with Folgory exchange.
Cardano coin (ADA) is a cryptocurrency launched in 2017. The currency is based on the Cardano network. The leader of the dev team is Charles Hoskinson, an experienced developer who worked for Ethereum and BitShares prior to the launch of Cardano. Cardano is the first cryptocurrency to use academically peer-reviewed open-source code, which makes this project quite unique.
The consensus algorithm of Cardano is Proof-of-Stake. Cardano is usually praised for its high level of security and quick transactions. Cardano currency quickly gained value and became one of the top 10 cryptocurrencies by market capitalization.