Cardano is described as 'decentralised public blockchain and cryptocurrency project and is fully open source. Cardano is developing a smart contract platform which seeks to deliver more advanced features than any protocol previously developed' and is an website in the Bitcoin & Cryptocurrency category. There are more than 50 alternatives to Cardano, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Android. The best alternative is Bitcoin, which is both free and Open Source. Other great sites and apps similar to Cardano are Monero (Free, Open Source), Ethereum (Free, Open Source), Litecoin (Free, Open Source) and NameCoin (Free, Open Source).
Litevault is an online wallet service which uses in-browser cryptography to reduce the risk of the coin operator running with the funds. This same system is used by Blockchain.info - a well known online Bitcoin wallet (UNAFFILIATED WITH LITEVAULT).
Catcoin launched on December 24th 2013 as a scrypt version of Bitcoin, with only 21 million coins to be mined at 50 coins per 10 minute blocks. We are an open community that wishes to use P2P tech to better the lives of cats and their humans. (From official website)
Peony coin is a cryptocurrency with Scrypt algorithm about a possibility of POS of mining – PEONY (PNY). According to the teachings of Feng Shui the peony attracts luck and symbolizes all the best that happens in a human life.