IPIP 1.3 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 actual developer of this free Mac application is Fnoz. The software lies within Internet & Network Tools, more precisely Network tools.
From the developer:
Get IP Address in Status Bar quickly.
It is designed mainly for developers and network workers. It contains LAN IP, Public Net IP and ISP code.
You may want to check out more software for Mac, such as Best Trace, which might be related to IPIP.