Download of FaceBoof 1.0 for Mac was available 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 actual developer of this software for Mac is B-L-A-C-K-O-P. The software lies within Design & Photo Tools, more precisely Viewers & Editors.
From the developer:
FaceBoof! allows you to combine up to three different effects (including any CatEye effects) into one mega-effect. FaceBoof! also includes Face-tracking technology. It's really cool. Check it out.
You may want to check out more Mac applications, such as PKCS#7Viewer, which might be similar to FaceBoof.