Downloading Celview 3.0 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 software lies within Internet & Network Tools, more precisely Network tools.
From the developer:
Celview for Mac provides you with the ability to connect to IBM AS/400 and Mainframe systems, providing 3270 and 5250 terminal emulation, file transfer, and printing capabilities.
You may want to check out more Mac applications, such as LaCie IPConfigurator or attach, which might be similar to Celview.