Forth
Forth is a stack-based programming language known for its simplicity, flexibility, and efficiency. It is commonly used for low-level systems programming, embedded systems, and interactive command line interfaces.
Hello, world code example:
." Hello world!"
Popularity: Less than 1% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.
Repositories on GitHub: 1,819