Download of ChatGrape 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 free Mac application is UberGrape GmbH. The application lies within Communication Tools, more precisely Texting & Video calls.
From the developer:
ChatGrape is a handy application that lets you have access to your rooms, private messages, and stay in touch with your colleagues and all activities from external services, wherever you are. The program will help you be always connected to your team - at the office, at home, and on the go.
You may want to check out more software for Mac, such as iChatMonitor, X-Lite 3 or Skype2Prowl 2, which might be related to ChatGrape.