Nano (formerly RaiBlocks) (XRB)

Formally known as RaiBlocks,  Nanois a coin focused on tackling the scalability problem. As described in their whitepaper, this coin has near-instant transactions with very low fees. They operate with the motto of "do one thing and do it well". Their goal is to give users a level of performance and scalability that is unmatched by any other platform. 

Nano achieves this with a unique programming structure where each account has its own unique blockchain. This allows each chain to update asynchronously to the network which results in fast transactions and minimal overhead.

News Source : TheCoinRepublic