Are you referring to the earlier CLIM from CMU [1] or McCLIM [2] or
another specific implementation? My understanding is that "CLIM"
today usually implies the spec, but I've yet to use any of these
packages.
What did you or others appreciate most about its package
organization?
McCLIM seems to separate API from internals and uses various systems
named `mcclim/foo` and packages named `mcclim-foo` invoked by those
systems. This is just from glancing at various *.asd files and
package.lisp.
The older CMU version seems to be more fine-grained by separating
platform-specific bits under `impl_dep` subdirectory.