OnOneSoftware have just released Perfect Black & White for Mac. This app allows you to develop your own stunning black and white images. Its powerful and intuitive tools give you both instant results and complete creative control. Use Perfect B&W to add dramatic and elegant looks to your photos and create the many moods black and white photography can evoke—resulting in beautiful and provocative imagery. This app retails for $29.99/£20.99 and you can download it here.