— Clozure CL site

Clozure CL is an implementation of Common Lisp. Other implementations of Common Lisp.

Clozure CL is a free Common Lisp implementation [...] Some distinguishing features of the implementation include:

  • fast compilation speed
  • native OS threads
  • precise, generational, compacting garbage collector
  • convenient foreign-function interface

Clozure CL used to be called OpenMCL. It is also sometimes called CCL. You will see the three names being used interchangeably.