BlackCoin is described as 'Blackcoin is a scrypt based coin launched on February 24th. It boasts 10 second transaction times (very fast), and unlike most other coins, can't be mined anymore. It has entered a full Proof-of-Stake mechanism, making it very energy efficient and allowing for 1% annual' and is a cryptocurrency coin in the bitcoin & cryptocurrency category. There are more than 50 alternatives to BlackCoin for a variety of platforms, including Web-based, Linux, Mac, Windows and Android apps. The best BlackCoin alternative is Monero, which is both free and Open Source. Other great apps like BlackCoin are Bitcoin, PayPal, Ethereum and GNU Taler.