Disk Cleaner 3.4 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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. The software lies within System Tools, more precisely File Managers. This software for Mac OS X is a product of Cokesoft.
From the developer:
Disk Cleaner is an application which helps you free up disk space by removing gigabytes of cached and unneeded files from your hard drive. With one press of a button, Disk Cleaner can empty applications Caches, application Logs, as well as downloads Folder.
You may want to check out more software for Mac, such as U2Any Disk Cleaner, Disk Clean Pro or Disk Cleaner CB - Free Space, which might be related to Disk Cleaner.