It's a little obscure, but look at Embryo: http://docs.enlightenment.org/auto/embryo/ http://docs.enlightenment.org/auto/embryo/ The interpreter was specifical

It's a little obscure, but look at Embryo: http://docs.enlightenment.org/auto/embryo/ http://docs.enlightenment.org/auto/embryo/ The interpreter was specifically designed with the assumption that Embryo scripts would come from untrusted sources. I believe that Enlightenment allows Embryo scripts to be embedded inside of theme files, for example.