Gocoin

An open-source Bitcoin solution written in Go language (golang). It can be built for every platform that has a working Go compiler.

Features

Gocoin has a several unique features, that distinguish it from the original bitcoin client.

All the unspent outputs are kept in memory, so switching between different wallets is very fast.
Allows a user to limit the upload and download network bandwidth used by the client.
Works with its own implementation of a cold storage wallet.

For security reasons, it is supposed to be used with a PC that has never been (and will never be) connected to a network.
The wallet is deterministic and a seed-password based, so as long as you remember the password, you do not need to backup it, ever.
Additionally you can import private keys for your existing bitcoin wallet.
Has very low hardware requirements, so you can run it on i.e. Raspberry Pi

The client node requires 64-bit platform and at least 4GB of system memory. It also requires a file system that can handle files larger than 4GB.

No GUI
Works only with entire (mined) blocks and does not rely transactions, except from sending own transactions to the network

Gocoin was written by a single person for a private purposes. The software's first public release was announced in May 2013 on Bitcointalk forum.^[1]