Curl

Curl is a programming language designed for creating rich, interactive web applications. It integrates HTML, JavaScript, and other web technologies into a single language for building dynamic user interfaces. Its main uses include developing web-based user interfaces, web services, and client-side applications.

Popularity: Less than 1% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.

• Official Website
• Wikipedia page