You’ve heard me rave about Nik Silver Efex Pro. One of the things I like about it is that you can create your own custom B&W styles at the click of a button. You can also share those styles with other photographers.
Nik Software has created a page full of additional styles that you can download for Nik Silver Efex Pro free of charge. If you have your own styles you’d like to share, let us know.