Tested to work in Visual FoxPro 9 and it turned out that ODBC drivers for PostgreSQL, SQLite, Interbase, Firebird are working perfectly with it.
You can download working drivers from here:
Visual FoxPro 9 ODBC driver for PostgreSQL
Visual FoxPro 9 ODBC driver for SQLite
Visual FoxPro 9 ODBC driver for Interbase
Visual FoxPro 9 ODBC driver for Firebird