2881. xuriella
      Xuriella XSLT is an implementation of XSLT 1.0, written entirely in Common Lisp
2882. XXTEA
      XXTEA is an encryption algorithm, first introduced in 1998, which is relatively easy to implement
2883. yaclml
      yaclml (Yet Another Common Lisp Markup Language) is an HTML generator and HTML template library
2884. Yakov Zaytsev
      I'm a Person
2885. Yale Haskell
      Yale Haskell is an early (1993) implementation of the Haskell programming language in Common Lisp
2886. YAML
      Yet Another Markup Language:
2887. Yarden Katz
      Same person as Jordan Katz
2888. YASON
      YASON is a Common Lisp library for encoding and decoding data in the JSON interchange format
2889. YHTML-TEMPLATE
      YHTML-Template is an HTML template library based on Edi Weitz's HTML-TEMPLATE
2890. yid
      yid (Yacc Is Dead) is a parser generator based on Brzozowski's derivative from regular expressions to context-free grammars

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