Downloading WhatFont 2.1.1 for Mac from the developer's website was possible 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 free Mac application is Chengyin Liu. The software lies within System Tools, more precisely Fonts.
From the developer:
WhatFont is a handy application that can easily get font information about the text you are hovering on. To embrace the new web font era, WhatFont also detects services used for serving the font. Now the application supports Typekit and Google Font API.
You may want to check out more Mac applications, such as DfontSplitter, Embrilliance or Ultra Character Map, which might be related to WhatFont.