I am a fan of the Julia language. Tremendously powerful analytical environment, compiled, high performance, easy to understand and use, strongly typed, … there’s a long list of reasons why I like it. If you are doing analytics, modeling, computation in other languages, it is definitely worth a look. Think of it as python, compiled, with multiple dispatch and strong typing … and no indent-as-structure problem. My Julia fanboi-ism aside, there was an interesting blog post about using JuMP, a linear programming environment for Julia.