You can download Borland InterBase 7.5.1 from our software library for free. The program is categorized as Development Tools. The actual developer of the software is Embarcadero Technologies, Inc.
From the developer:
Embarcadero® InterBase® XE is a high-performance, easy-to-install, full-featured database that has been proven in thousands of business-critical server, desktop, and embedded applications. InterBase provides you with a resilient, lightweight, low-cost database platform for data management.
You may want to check out more software, such as Devart dbExpress driver for InterBase, InterBase Data Access Components or EMS SQL Query 2007 for InterBase/Firebird, which might be similar to Borland InterBase.