There are a number of driver managers available on the web from open source software projects. Netezza supports the unixODBC driver manager component for Linux/UNIX platforms. You can find information about unixODBC and download kits at http://www.unixodbc.org.
A number of commercial software vendors develop and market ODBC components, including driver managers. Netezza has licensed and provides support for the DataDirect driver manager from DataDirect Technologies, included with your system. It is not necessary to install the Netezza-licensed version of the DataDirect driver manager to access the Netezza ODBC drivers. You can find more information at http://www.datadirect.com.