The bdb v2.0 module uses the software Berkeley DB: Version 3.1.14, June 16, 2000, developed by Sleepy Cat Software.
The bdb v1.0 module uses the software Berkeley DB: Version 3.0.55, November 15, 1999, developed by Sleepy Cat Software.
Sleepycat Software email@example.com
394 E. Riding Dr. 510-526-3972
Carlisle, MA 01741 877-SLEEPYCAT (toll-free, USA only)
This product includes software developed by Harvard University and its contributors.
The use of this module is NOT governed by the GNU GPL, because it uses the underlying Berkeley Database software and they happen to use a stricter licensing structure. But don't panic. The software license grants almost the same level of freedom as GNU GPL. (I emphasize: almost.) Before using the software you have to see the actual license text reading the file License in the source distribution of the module. This is the verbatim copy of the file with the same name from the Berkeley DB source distribution.