This project:
http://code.google.com/p/cbor/

The standard:
http://tools.ietf.org/html/rfc7049

a Go implementation in progress
https://github.com/cespare/cbor

another python implementation, currently not as complete
https://github.com/svartalf/python-cbor

http://cbor.io/

https://github.com/cbor/test-vectors/

git clone https://github.com/cbor/test-vectors/

go install code.google.com/p/cbor/go

godoc code.google.com/p/cbor/go

TODO: 
compare go impl to
https://github.com/ugorji/go
go get github.com/ugorji/go/codec
