Mastercoin / Omni is a digital currency built on top of the Bitcoin blockchain. Its features include the development of a decentralised exchange and the implementation of smart property and savings wallet. The Master Protocol facilitates the creation and trading of smart properties and user currencies as well as other types of smart contracts. Mastercoin enables the Bitcoin eco-system to become more decentralized. The Mastercoin project was launched on 31 July 2013 with a one-month long fundraiser. Those interested in obtaining Mastercoin may send bitcoin to an 'Exodus Address' where the funds collected would be used to fund the development of Mastercoin. Around 500 people invested in Mastercoin sending roughly 5000 bitcoins to the Mastercoin project.
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