Crystal
Crystal is a statically typed, compiled programming language with a syntax similar to Ruby. It is designed for high-performance, concurrency-focused applications and is often used for web development, system programming, and building command-line tools.
Hello, world code example:
puts "Hello world!"
Popularity: 0.45% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.
Repositories on GitHub: 8,299