Oracle drivers

Greetings,
I am creating this discussion in hopes to find direction when working with the Oracle database. I am not sure if this is were to post the question so if there is somewhere else I should be please let me know.
Currently I have softwarethat has been developed, which uses SQL to store information. I am now required to modify the software so that it would be able to use Oracle also. My question is this; where can I download, and how do I set up the necessary drivers so that I can transfer my information to Oracle also? I am looking for a solution that uses ODBC, I am used to setting up everything through Data Source in the windows environment. Any information that can be provided would be very helpful.

Regards Steve?