QuickCHM 1.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Lifestyle Tools, more precisely Bookkeeping & Cataloging. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
QuickCHM is a Quicklook plugin for Mac OS X Leopard. It dispalys your favorite CHM files as icons in finder, and dynamicly generate preview for them. In short, it handle CHM files like how Leopard handles PDFs, give your ebook repository a beautiful look
You may want to check out more software for Mac, such as Moose - by M. Uli Kusterer or Postcard_Database, which might be related to QuickCHM.