zygomys
zygomys is an embeddable scripting language. It is an object-oriented style has modern Lisp, and offers an explanation REPL (Read-Eval-Print-Loop; that is, it has a command line interface). zygomys allows you to create a specific language to drive your program is very convenient.
installation:
$ go get github.com/glycerine/zygomys/cmd/zygo