There was a download of InterBase 12.0 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This program is a product of Synectics Software. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
From the developer:
InterBase is the winner of Total Telco’s IoT Award for “the most innovative use of data” thanks to its highly scalable patented Change Views technology, which ensures the fastest, simplest and most secure way to track changes to persisted data. Reconnect anytime to get personalized field-level changes for any user/device using standard SQL, and update remote cached data rapidly with small, context-aware deltas.
You may want to check out more software, such as Easysoft ODBC-Interbase Driver or EMS Data Export for InterBase/Firebird, which might be related to InterBase.