This is an R package providing mechanisms to run with external programs such as Julia, Shell, and Python, etc. The basic idea is to open a background process, pipe the source code into the process, evaluate it, and obtain the printed results.

At the moment, there are only a few very simple engines:

• a Julia engine (using TCP sockets; an example)
• a bash engine (using TCP sockets; an example)
• a python engine(using TCP sockets; an example)

Contributions welcome!

This package was originally designed for the language engines in knitr, but it might be useful for more general cases.