GNU Artanis, a web application framework developed in 2013, is written in Guile Scheme. Inspired by Ruby on Rails and Sinatra, Artanis emphasizes simplicity and ease of use. Notably, Artanis is designed to be “Scheme only,” avoiding C code extensions whenever possible. Instead, contributors may provide extensions in C, but the core remains pure Scheme due to GNU Guile’s exceptional C library interaction capabilities. The framework’s default server core, “Ragnarok,” features a high-performance, asynchronous, non-blocking design based on co-routines utilizing Delimited Continuation. GNU Artanis serves as the official project of the GNU operating system and the HardenedLinux community.
https://artanis.dev/blog/1.0.0-release.html