Linux Database HOWTO (PostgreSQL Relational Database System): ODBC Drivers for PostgreSQL

6. ODBC Drivers for PostgreSQL

ODBC stands for 'Open DataBase Connectivity' is a popular standard for accessing information from various databases from different vendors. Applications written using the ODBC drivers are guaranteed to work with various databases like PostgreSQL, Oracle, Sybase, Informix etc..

http://www.ids.net/~bjepson/freeODBC/ This is a cost free version of ODBC.
http://www.openlinksw.com Open Link Software Corporation is selling ODBC for PostgreSQL and other databases.