Downloading OpenC6 0.9.9 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. This free software for Mac OS X is an intellectual property of Giorgio Alfarano. The program lies within Communication Tools, more precisely Texting & Video calls. We recommend checking the downloaded files with any free antivirus.
From the developer:
OpenC6 is a free client which allows to connect to the popular Italian chat C6 by http://community.alice.it
You may want to check out more Mac applications, such as iChatMonitor, ISL Pronto or Instant Messaging, which might be similar to OpenC6.