PicoLisp
PicoLisp is a minimalist Lisp dialect designed for simplicity and extensibility. It is often used for developing database applications, web servers, and artificial intelligence systems.
Hello, world code example:
(prinl "Hello world!")
Popularity: Less than 1% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.
Repositories on GitHub: 127