AccessLog
A C++ wrapper to give an XBase fashion to the Berkeley DB library.
url: www.geocities.com/lpiergentili/accesslog.htm
Database Template Library
Provides ODBC recordsets just like STL containers, including writing the contents back to the database.
url: dtemplatelib.sourceforge.net/index.htm
freeodbc++
A C++ library for accessing SQL databases. Designed with standards in mind, so it provides a subset of the well-known JDBC 2.0 and runs on top of ODBC. [Open Source, LGPL]
url: orcane.net/freeodbc++/
MetaKit structured storage
Highly portable, lightweight database manager, usable from several languages.
url: www.equi4.com/metakit/
MySQL++
A C++ API for MySQL. Tries to make working with queries as easy as working with other STL containers.
url: www.mysql.com/downloads/api-mysql++.html
ODBC Broker
C/C++ library to access ODBC data sources with only a few lines of code. Now, make dynamic database engines to access any ODBC data sources without knowing about ODBC!
url: www.sqldata.com/broker.htm
OLEDB
A class library used to open a Microsoft Access or SQL database. [Open source]
url: www.thesett.co.uk/swdev/
OTL
Oracle, Odbc and DB2-CLI Template Library. A set of classes that wrap around the dynamic database programming interfaces of Oracle, DB2 and ODBC. Also provides support for block-updates and other caching mechanisms.
url: otl.sourceforge.net/
s-mail project - DObject Library C++ Database Connectivity
A C++ database interface similar to the JDBC technology. Currently available drivers support: MySQL database, mdb files via the ADO component (win32 platform only). [Open source, GPL]
url: sadlocha.strefa.pl/s-mail/doldbc.html