The 1.1.1 version of BeepTool for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free software for Mac OS X is a product of BeepTool Inc. BeepTool for Mac lies within Communication Tools, more precisely Texting & Video calls.
From the developer:
BeepTool gives you cheap calls anywhere in the world. It provides you unlimited free calls, video calls, and text messages to other BeepTool users via 3G/4G/LTE or WiFi.
Calling non-users is also possible, as the program allows you to call landlines and mobiles, even if they are not BeepTool numbers.
You may want to check out more software for Mac, such as iChatMonitor, ISL Pronto or Instant Messaging, which might be related to BeepTool.