Adabas D, Empress, IBM DB2, Informix, Ingres, Interbase, Frontbase, mSQL, MS SQL Server, MySQL, ODBC, Ovrimos, Oracle (OCI7,OCI8), PostgreSQL, Raima Velocis, Solid, Sybase, DB++ dBase, filePro (read-only), dbm (ndbm, gdbm, Berkeley db)