Btcd

btcd is a full-node implementation in Google Go by Conformal. Its project page on GitHub says:

“It currently properly downloads, validates, and serves the block chain using the exact rules (including bugs) for block acceptance as the reference implementation (bitcoind). […] btcd does NOT include wallet functionality and this was a very intentional design decision.”

See also the <tt>btcd</tt> tag on Conformal’s blog, especially the “ready for public testing” announcement.

Because BTCD uses an alternative consensus implementation, it is vulnerable to breaking consensus and fake confirmation attacks.

Source

http://bitcoin.it/

See Also on BitcoinWiki