Bitcoin is a cryptocurrency and a digital payment system invented by an unknown programmer, or a group of programmers, under the name Satoshi Nakamoto.It was released as open-source software in 2009.The system is peer-to-peer, and transactions take place between users directly, without an intermediary. These transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain. Since the system works without a central repository or single administrator, bitcoin is called the first decentralized digital currency.Besides being created as a reward for mining, bitcoin can be exchanged for other currencies, products, and services in legal or black markets.As of February 2015, over 100,000 merchants and vendors accepted bitcoin as payment. According to research produced by Cambridge University in 2017, there are 2.9 to 5.8 million unique users using a cryptocurrency wallet, most of them using bitcoin.
Source Code: https://github.com/bitcoin/bitcoin
The win.win platform (TWINS) aims to introduce a 'truly decentralized exchange platform and proof-of-stake blockchain network with cross-chain atomic-swaps capabilities to facilitate the direct transacting of value between network users'. The project claims that there will be no fees for the direct peer-to-peer exchanges, as these transactions will be performed directly between user wallets. The TWINS cryptocurrency will be used to power the exchange platform for buy and sell order listings, as well as reward the hosting of network nodes.
Source Code: https://github.com/NewCapital/TWINS-Core
FIX Network will utilize and leverage the existing cellular infrastructure by defining and implementing a new blockchain-based security protocol. This architecture will enable mobile operators to provide a safe environment for protecting our identities and digital assets such as cryptocurrency.
The FIX Coin will be used to participate in the FIX Network, and enable access to the Decentralized Security Policy. Network participants, including mobile operators, will be able to host and operate nodes for the real-time and secure participation in the FIX Network blockchain, and will be rewarded with newly mined FIX Coins. The FIX Coins may also be used as a real-time, peer-to-peer IOU gross settlement asset between telecom operators.
Source Code: https://github.com/NewCapital/FIX-Core