1. CLUnit
    CLUnit is a Common Lisp unit testing framework
  2. CLUnit2
    Maintained fork of CLUnit
  3. CLUS
    CLUS, or Common Lisp UltraSpec, is a community project to create a contemporary and unified documentation file for the whole modern Common Lisp universe
  4. clutter
    Annotations/decorators/attributes for CLOS classes and slots
  5. CLVM
    CLVM stands for "Common Lisp Virtual Machine", which is Vapourware
  6. CLWeb
    CLWEB is a literate programming system for Common Lisp by Alex Plotnick
  7. clws
    clws is a WebSocket server, using IOlib
  8. CLX
    CLX provides an implementation of the X Window System protocol to Lisp graphics library[ies] and applications
  9. CLX Manual
    The manual for CLX is available as html pages or as a texinfo file in the CLX repository
  10. CLX-CURSOR
    A library for rendering antialiased cursors using CLX and XRender