Crystal (programming language)
Description: Crystal is a compiled, general-purpose, object-oriented programming language with a syntax similar to Ruby. It has static type checking, bindings to C libraries, and claims to have performance comparable to statically typed languages like C++ and Go.
Type: software
Pricing: Open Source
Wolfram Alpha
Description: Wolfram Alpha is a computational knowledge engine that allows users to get instant expert-level answers to questions on math, science, and many other topics by typing queries in plain language. It understands and computes answers across many domains.
Type: software