Viacoin is a Script-based cryptocurrency derived from Bitcoin. Similar to Bitcoin and other cryptocurrencies, Viacoin is also an open-source project. Viacoin aims to be the cryptocurrency of future, by integrating many innovative key technologies such as SegWit, APoW, Lightning Network, Dark Gravity Wave, and more. Viacoin claims to allow 25 times faster transactions than Bitcoin. It can be merged mined with the other Script cryptocurrencies like Litecoin, This is done by using an Auxiliary Proof-of-Work (AuxPoW) algorithm. Every six months, Viacoin halves the block reward that is given to users for Viacoin mining, resulting in a low inflation rate of Viacoin. Check out CoinBureau for the complete review of Viacoin.
Bismuth, a digital distributed self-regulating database system whose primary application is currency, and its first application is mining. It comes with a set of DAPPs out-of-the-box. Bismuth is not based on the code of BTC or any of its derivates, it is only inspired by some ideas laid down by Satoshi Nakamoto (BitCoin), Sunny King (Peercoin), NXT and ETH developers. Bismuth does not draw any code from other repositories, instead, it reformulates the cryptocurrency code in its own terms to be easily readable, compatible across all platforms, integrated into business solutions with utmost ease and most importantly open for development to a wide public through its simplicity while minimizing the security risk for custom code implementations. Bismuth is a decentralized transaction platform focused on modularity and open source approach. It comes with default decentralized applications and tools out of the box, not only to be used by everyone but also to be hosted by anyone. These applications are supplied as interpretation engines, which prevents blockchain bloat. Inspired by Satoshi’s whitepaper, Bismuth also offers optional hyperblocks as a pruning mechanism, a system which greatly reduces disk space usage and increases execution speed.