Chapel
Chapel is a parallel programming language designed for productivity and performance in large-scale scientific and parallel computing applications. It aims to simplify the development of parallel codes and make them portable across different hardware architectures.
Hello, world code example:
writeln("Hello world!");
Popularity: Less than 1% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.
Repositories on GitHub: 247