Three interesting but little known programming languages

The descriptions below are from Wikipedia. Julia is a high-level dynamic programming language designed to address the requirements of high-performance numerical and scientific computing while also being effective for general purpose programming.[1][2][3][4] Unusual aspects of Julia's design include having a type system with parametric types in a fully dynamic programming language and adopting multiple dispatch as its core programming paradigm. It allows for parallel and distributed computing; and direct calling of C and Fortran libraries without a compiler without glue code and includes best-of-breed libraries for floating-point, linear algebra, random number generation, fast Fourier transforms, and regular expression matching. Julia's core is implemented in C and C, its parser in Scheme, and the LLVM compiler framework is used for just-in-time generation of machine code. The standard library is implemented in Julia itself, using the Node.js's