Gocoin is a full Bitcoin solution written in Go language (golang).
The wallet combined with balio tool also provides a working solution for Litecoin.
The software's architecture is focused on maximum security and good performance.
The client (p2p node) is an application independent from the wallet.
The wallet is deterministic and password seeded. As long as you remember the password, you do not need any backups of your wallet.
There is additional tool called downloader that can quickly sync (download) the blockchain state from the p2p network. Use it for the initial blockchain download or to sync your client after having it offline for a longer time.
In addition there is also a set of more and less useful tools. They are all inside the tools/ folder. Each source file in that folder is a separate tool.
See external links to read some additional info about the project.