To learn about CLIM, you could do a Google search. But most of the
useful online CLIM resources have already been "mined" and
collected. You can access this material from a few web pages, which
are the roots from which you can explore the graph of links. Here are
the pages, together with some notes:
A Guided Tour of the Common Lisp Interface Manager is a
good overview of the CLIM concepts, but ignore the sample code: it was
written for an early version of CLIM, and it may look confusing.
I found the user guide by Franz very useful, and better than
Xanalys'. It has some tutorial style material, and provides a good
number of examples.
On first reading, you may skip both CLIM Layout Protocol for
Dummies and User Interface Management Systems: The CLIM
Perspective: they may be too technical. The latter may have
actually been meant as an introduction, but I found it confusing at
first, and understood it only after learning more about CLIM.
When you feel sufficiently comfortable with CLIM, check the
mailing list archives, which are a rich source of examples and
TUNES Project general CLIM principles overview is a short
page, but it is among the best explanations of the main CLIM
concepts I have found.
Presentation-Based User Interfaces is the dissertation
mentioned in the list of references of most CLIM papers. It's a bit
technical, but useful if you are interested in the gory details.
This page has links to most of the CLIM applications available
online. Only the ones listed at the top are known to work with
McCLIM. But all this code is very useful for understanding how CLIM
is used in practice. It's worth studying in detail.
Be sure to also check the links in section Code Repositories and
Collections, especially that to the CLIM section of the CMU
Common Lisp Repository (the code in the CLIM 1 directory is based on
an early version of CLIM and may be confusing at first).
If you find more useful resources, please add links.