Modula-3
Modula-3 is a programming language designed for writing reliable and efficient software. It is primarily used for developing system software and distributed applications.
Hello, world code example:
MODULE Goodbye EXPORTS Main;
IMPORT IO;
BEGIN
IO.Put("Hello world!\n");
END Goodbye.
Popularity: Less than 1% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.
Repositories on GitHub: 182