- cl-base32 - CL-Base32 is a Common Lisp library for encoding / decoding bytes to / from base32 strings (RFC 4648)
- cl-base64 - cl-base64 provides base64 (RFC 1521) encoding and decoding
- cl-bencode - cl-bencode is a library for working with the bencode BitTorrent data format
- CL-ISBN - CL-ISBN is a data format library for parsing, validating, and hyphenating International Standard Book Numbers (ISBNs)
- cl-qprint - CL-QPrint is a library for encoding to and decoding from strings in quoted-printable (MIME) data format
- cl-yaclyaml - Yet Another Common Lisp YAML processor
- CLLIB - CLLIB is a varied collection of Common lisp tools and routines in CLOCC
- guess - guess Japanese encoding (gauche's algorithm)
- html-entities - HTML-ENTITIES is a library for encoding and decoding (escaping and unescaping) special characters in HTML (or SGML or XML, whatever)
- s-base64 - Base64 encoding/decoding library by Sven Van Caekenberghe
data format
Anything to do with data formats.