Please nominate your favorite Scheme libraries

[lassik]

Here are some recommendations from @weinholt:

• (chibi match) - excellent pattern matching syntax. There are a few R6RS-adaptions here and there, but the original from foof is in Snow and Akku.
• struct-pack - tooting my own horn here, but this R6RS library implements pack/unpack for bytevectors. Similar libraries exist in Python and Perl.
• nanopass - a compiler framework
• packrat - a parser library
• r6rs-pffi - portable foreign-function interface
• SRFI 1, 13 and 115 for lists, strings, and regex.
• htmlprag, which is in a few places, e.g. wak-htmlprag - pragmatic HTML parser and emitter

[lassik]

r6rs-pffi added. Feel free to suggest/send PRs about other libraries.

[da-liii]

case* in S7 Scheme: https://cm-gitlab.stanford.edu/bil/s7/-/blob/master/case.scm

[lassik]

We shoud probably have a dedicated section for pattern-matching libraries since there are several popular ones for Scheme.