Tableau uses native connections for what you see in the "drivers" site. This means you will NOT see ODBC stuff. This is good as the Tableau native drivers are typically better at getting the data than ODBC. Have you tried to connect to an Oracle db? Remember, you'll need to have your TNSNAMES.ORA file set up (that would be necessary for ODBC, too).
By the way, click on the version number to download the driver