Vimscript
Vimscript is a scripting language designed for the Vim text editor, primarily used for customizing and extending Vim's functionality through scripts and plugins. It allows users to automate tasks, create custom shortcuts, and modify the behavior of Vim according to their specific needs.
Popularity: Less than 1% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.