Gapcoin is a new prime number based p2p cryptocurrency, which tries to eliminate the sticking points of other scientific currencies like Primecoin or Riecoin. It's a fork of Satoshi Nakamotos Bitcoin, a decentralized payment system which is independent of banks, governments and other centralized regulators. With Gapcoin, you will be able to anonymously send money around the globe in no time. The big improvement in comparison to Bitcoin is that instead of burning electricity for its own sake, Gapcoins Proof of Work function actually does useful work by searching for large prime gaps
ZumCoin- Simplified Private Digital Currency- is a robust blockchain technology designed to provide decentralized cross-border payments; faster, cheaper, and secure. It is an open-source project; being developed by a diverse team of technically competent individuals who are well-versed in distributed ledger technologies, cryptography, and economics. The project is aimed to develop a multi-layer robust blockchain ecosystem that is founded on three basic tenets: PRIVACY — FREEDOM — EQUALITY