Dogecoin P2P Cryptocurrency
Dogecoin is a free open source peer-to-peer electronic cash system that is completely decentralized, without the need for a central server or trusted parties. Users hold the crypto keys to their own money and transact directly with each other, with the help of a P2P network to check for double-spending.
Full transaction history is stored locally at each client. This requires 20+ GB of space, slowly growing.