Inko 2.3.3 for Mac could be downloaded from 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. The application lies within Design & Photo Tools, more precisely Viewers & Editors. This free Mac app is an intellectual property of Creaceed SPRL.
From the developer:
Inko is a collaborative whiteboard that lets you draw together using local or remote devices. The tool is ideal for team coworkers in a brainstorming session, for a creative classroom project, or for an interactive meeting between a graphic designer and their client. You can create a group and just start drawing together. There is no need for complex network setup, or even any network at all, thanks to nearby connectivity.
You may want to check out more software for Mac, such as 3D Image Commander, UnCoverIt or Ashampoo Cover Studio 2 for Mac, which might be related to Inko.