Awesome
mahonia
character-set conversion library implemented in Go.
Mahonia is a character-set conversion library implemented in Go. All data is compiled into the executable; it doesn't need any external data files.
based on http://code.google.com/p/mahonia/
install
go get github.com/axgle/mahonia
example
package main
import "fmt"
import "github.com/axgle/mahonia"
func main(){
enc:=mahonia.NewEncoder("gbk")
//converts a string from UTF-8 to gbk encoding.
fmt.Println(enc.ConvertString("hello,世界"))
}