Crystal & Julia 1.0. Crystal because it's a blazing fast, compiled and statically typed version of Ruby (or 80% anyway), and it's web server is awesome. Now it just needs full concurrency.
Julia because it offers a nice, performant alternative to Python & R in data science, while avoiding Java & C++. It has some really nice features like multiple dispatch and the ability to run R, Python, Fortran and C code inside of it, so you can use libraries like Numpy in Julia.
Julia because it offers a nice, performant alternative to Python & R in data science, while avoiding Java & C++. It has some really nice features like multiple dispatch and the ability to run R, Python, Fortran and C code inside of it, so you can use libraries like Numpy in Julia.