The 3.3 version of Yobi 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. This free software for Mac OS X is a product of YiB Inc. The program lies within Communication Tools, more precisely Texting & Video calls. We recommend checking the downloaded files with any free antivirus.
From the developer:
Yobi is a convenient way for entrepreneurs, small businesses, influencers, and executives to manage their communications easily and efficiently. All you need to do is download the app, select a new business number, and start making calls in minutes. You can get a dedicated business line and SMS plus you can have all your social media communications in one place.
You may want to check out more Mac applications, such as YobiDrive WebGATE, which might be related to Yobi.