Crystal
In plain terms
A language with Ruby-like syntax that compiles to fast native code.
Going deeper
Crystal offers Ruby's elegant syntax with static typing and native compilation, aiming for both productivity and speed. Type inference keeps code concise.
Under the hood
Whole-program type inference means you rarely write type annotations despite static typing; it compiles to efficient binaries via LLVM.
Examples
Web APIs (Lucky, Kemal), CLI tools, performance-sensitive Ruby alternatives.
Think of it like...
Like Ruby in a tailored suit and running shoes: same charm, far more speed.