This script converts and saves an image to black-and-white using 20 different methods (although more methods can be added). Upon completion all selected variations can automatically opened in Photoshop, making it easy for you to compare the results.
To download this script, right-click (Ctrl-click on the Mac) on the appropriate version below, and choose "Save Target As".
Black & White Variations
Version: 0.5.0 (December 24, 2009)
Download for: Photoshop CS2+
Download the script and copy it into your "
Adobe Photoshop CS#/Presets/Scripts" folder.
After restarting Photoshop, the script should appear in the File » Scripts menu.