Autochromatic   
http://www.namesuppressed.com

Autochromatic is a Photoshop plugin that helps you create duotone, sepia, greyscale and color tint effects. You can use Autochromatic to add a rust or lavender tone to your image, create psychedelic color effects, change the foreground and background color of your pictures, or adjust the colors to blend with the color scheme of your web page. Autochromatic comes with over 30 presets to get you started and a randomize control to spark your creativity. You can also save your own presets in the registered version. The installer program gets you up and running quickly, so you can be creating beautiful images in no time.

PhotoKit   
http://www.pixelgenius.com

PhotoKit is a photographer's plug-in toolkit for use with Adobe Photoshop comprising effects that offer accurate digital replications of analog photographic effects. PhotoKit’s image enhancements and adjustments are designed to work in a way familiar to photographers. A simple dialog calls up the PhotoKit tool sets, where you can easily select the desired image effect, and let PhotoKit do the work and greatly improve your digital photography workflow. Works on 16 bit images in Photoshop CS or CS2.