C

chicken-scheme

SRFI 128: Comparators (reduced)

CHICKEN Scheme package and project manager, written in Rust.

Transducers for working with foldable data types.

Immutable Lists (see: https://srfi.schemers.org/srfi-116/srfi-116.html)

Sets and Bags (see: https://srfi.schemers.org/srfi-113/srfi-113.html)

Composable Scheme macro system based on the CK abstract machine

Flexible Scheme objects with message passing and prototypes