r4

r4 is a programming language created in 2009.

:r4 concatenative programming language with ideas from ColorForth.

• r4 website
• r4 is developed on GitHub and has 100 stars
• r4 first developed in https://github.com/phreda4/r4/issues
• r4 is written in Assembly language & SVG & Markdown & XML & Lisp & Ini