Mini SQL Server - Uses OLEDB 3.51 or 4.00, works with Winsock OCX, and does threading. Written in Visual Basic.Open Source Database Summit - September 23-25, 2001 in Providence, Rhode Island, for developers and IT professionals.
CQL++ - Both a single user and client/server versions with ODBC drivers. Distributed under a modified GPL that allows distribution of applications without including source code. Commercial support available.
Clip - Object oriented, CA-Clipper and Xbase compatible compiler.
ArunaDB - A database server written in Ruby that supports tables, indexes, triggers, sequences, views, stored procedures, and transactions.
Persistent Data Objects - A flexible, lightweight object oriented database system in C++ with an extensible back-end store design. MFC compatible version available. [GPL]
Open source databases - This article describes several open source relational database management systems for Linux.
Fast DB - Main memory object-relational DBMS featuring log-less transaction recovery, tight C++ integration, query language like SQL. Optimized for all data being held in RAM.