From article at
http://www.linuxdevices.com/news/NS9892138016.html:
"ITTIA has ported an embeddable, open source, C-language database to ARM Linux, and is inviting developers who write code for Linux on ARM to join a user support community..."
"The db.* database, a small-footprint C-language database, was first released by Raima in the 1980s as dbvista..."
For more info, see the above article and this link:
http://www.ittia.com/dbstar/dbstar.html