NameCoin!

Litecoin is a peer-to-peer Internet currency that enables instant payments to anyone in the world. It differs from its parent Bitcoin in that can be efficiently mined with consumer-grade hardware. Litecoin provides faster confirmations (targeted at every 2.5 minutes on average) and uses memory-hard, scrypt-based mining to target the CPUs and GPUs most people already have. The Litecoin network is scheduled to produce four times as many currency units as Bitcoin.

Dogecoin is an open source, decentralized, peer-to-peer cryptocurrency, favored by Shiba Inus worldwide.

Darkcoin is an open source peer-to-peer cryptocurrency that uses a system called Darksend to add privacy to transactions.It allows you keep your finances private as you make transactions, similar to cash.

Peercoin is a P2P digital currency and payment system optimized for security and energy-efficiency.

Lisk is a cryptocurrency that offers a next generation platform that allows for the development and distribution of JavaScript based blockchain applications.Lisk provides an easy to use interface and access full featured ecosystem.Through Lisk, developers can build, publish, distribute, and monetize their applications within a cryptocurrency powered system that allows for the use of customized blockchains, smart contracts, cloud storage, and computing nodes.

Bitcoin XT is an implementation of a full node that embraces Bitcoin's original vision of simple, reliable, low-cost transactions for everyone in the world.

Zcoin strives to increase individual liberty. By guaranteeing financial privacy, Zcoin can help ensure freedom of commerce. People should be able to transact however they want, as long as it does not infringe on the well-being or individual liberty of others. We are also big believers that freedom of commerce also facilitates peace and prosperity across countries and cultures. By guaranteeing financial privacy, Zcoin can directly guarantee fungibility, an essential property for free commerce.

Bitcoin Unlimited is a fork of the Bitcoin Core client, giving the miners and users the opportunity to determine the block size limit themselves.

MultiDoge is a desktop Dogecoin client, powered by dogecoinj. Ported from the MultiBit Bitcoin client.

Only 42 Coins will ever be mined. How many will you hold? Start mining 42 right away... before you can't mine any more.

Filecoin is a data storage network and electronic currency based on Bitcoin.