Pk Sharpener 2 is the latest version, lot of nice improvements. It is available in 64 bit as is Noise Ninja.
I believe that Convert To Black and White Pro is no longer available. The Imaging Factory shut down.
Many people seem to be in love with Nik Software's B&W program http://www.niksoftware.com/silverefexpro/usa/entry.php
Rich
I was a great fan of Convert to BW Pro, which worked fine for me up through CS4 (32-bit), even after the Imaging Factory shut down. The interface was highly intuitive, especially for those of us who spent many years in the chemical darkroom. When I got my 64-bit PC recently, I experimented a bit with the techniques that others have descibed for use in Photoshop or in Lightroom, and all of them seemed crude and awkward by comparison.
In some desperation I downloaded the demo of Nik's SilverEfexPro II, tried it a while, and bit the bullet and bought it. It is quite powerful, and I find myself usually using little more than the equivalent of Convert to BW Pro, but it seems the best current plugin for the purpose that I am aware of. The price is a bit high, but you can download a free trial. If you do, view their videos that show you the basic operations.