Where can I get SQL Client Access product for OpenEdge?

How to obtain the SQL Client Access license for OpenEdge 10, 11 or 12?
How do I download SQL Client Access product for OpenEdge 10, 11 or 12?
Is the SQL Client Access product free in OpenEdge 10, 11 or 12?
Which product needs to be installed in order to make a JDBC or ODBC connection to the OE database? 
How to make a JDBC or ODBC connection to the OE database?
Is there a 64-bit OpenEdge ODBC driver available on Windows?
Where to find the 64-bit OpenEdge ODBC driver for Windows ?

For OpenEdge 10 and later:

The SQL Client Access deployment component for OpenEdge 10 and later, can be downloaded for free from the Progress Electronic Software Download Center (ESD) for any of the same version(s) for which OpenEdge licenses have been purchased:

1. Go to the Progress Download Center. See Article Where is the ESD / Product Download Center?
2. Login with your ESD user credentials.
3. Select Software
4. Select Progress OpenEdge
5. Select the OpenEdge Version you're using
6. Scroll down to the entry: SQL Client Access
7. Select the SQL Client Access product.
8. Take note of the Serial Number and Control Code for the relevant Operating System (These are found at the top of the SQL Client Access download page in chart form, not in the license addendum as with other Progress products).
9. Choose the Operating System needed and start the download.
10. Install the SQL Client Access product using the Serial Number & Control codes noted from the top part of the the ESD download option.

Starting with OpenEdge 10.2A, a 64-bit ODBC driver for Windows was introduced.  It is available for download on the Progress ESD (Electronic Software Download) site, provided you have the appropriate OpenEdge licenses under maintenance.

For a non-current release (example: OpenEdge 10.2A):

Download Software >> CompanyName ESD  >>  Progress® OpenEdge®  >> Progress® OpenEdge® 10.2x >> Previous Releases (tab) >> Deployment Components Windows 64-bit >> SQL Client Access 

For the current release (example: OpenEdge 12.2):
 
Download Software >> CompanyName ESD  >>  Progress® OpenEdge®  >> Progress® OpenEdge® 12.2 >> 12.2 SQL Client Access >> Windows 64-bit

For the Linux platform a 64 bit ODBC driver was introduced with the SQL Client Access for OpenEdge 11.0.
When a 64 bit ODBC connection is needed on Linux to an OpenEdge version 10.1A or higher database then a 64 bit SQL Client Access from OpenEdge 11 or OpenEdge 12 will need to be installed to connect to the OpenEdge 10.1A or higher database. 

For Progress 9.1E

For Progress 9, SQL Client Access must be purchased. Please contact a Progress Account representative or Progress Customer Order Management for further details.

References to Other Documentation:
Progress Article(s):
How to install SQL CLIENT ACCESS product?   
Where is the ESD / Product Download Center?