Like Bitcoin, There are numerous other cryptocurrency similar in nature, including MasterCoin, ProtoShares, Litecoin, Peercoin, BitBar and many more.
One of them is Primecoin (sign: Ψ; code: XPM), a peer-to-peer open source cryptocurrency that implements a scientific computing proof-of-work system. Unlike Bitcoin or other virtual currencies, only Primecoin provides a proof of work that has