Downloading Crowdbeamer 2.1.6 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. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is RORYCO NV. The application lies within Audio & Video Tools, more precisely Streaming Media.
From the developer:
Crowdbeamer allows you to broadcast any video source (for example from your laptop, but also from digital signage sources or camera's) over a private WiFi network. This app allows you to not only view the presentation or video on their own device, but also take snapshots, make notes, and export to other business apps.
You may want to check out more Mac applications, such as PlayPod, EyeConnect or ffmpeg, which might be similar to Crowdbeamer.