1. X-Chat Common Lisp Plugin
    The X-Chat Common Lisp plugin is a plugin for X-Chat version 2 and up (the famous IRC client) that allows you to use Common Lisp scripts to control X-Chat behaviour
  2. x-html-template
    x-html-template is a HTML template library, forked from Edi Weitz's HTML-TEMPLATE and mostly compatible with it
  3. X.FDATATYPES
    XFDATATYPES implements 3 functional data structures:
  4. X.LET-STAR
    X LET-STAR is a convenience library not unlike bind, but smaller, extendible, nicely written and bug-free (hopefully :)
  5. X11
    X11 stands for 'X Window System, Version 11'
  6. xarray
    This package implements a generalized interface for array-like
  7. XCL
    XCL is a Common lisp implementation featuring a kernel written in C++ and an optimizing compiler with backends for x86 and x86-64
  8. XCVB
    XCVB, an eXtensible Component Verifier and Builder for Lisp is an attempt to replace asdf
  9. xelf
    Xelf is a simple 2-D game engine for Common Lisp
  10. xgboost
    Common Lisp interface to XGBoost