Here is a little program I whipped up to help me on my game for GAMMA 3D.

Download here!

Here is the page I found most of the methods for creating anaglyphs:
http://www.3dtv.at/Knowhow/AnaglyphComparison_en.aspx

If you go there, some of the boxes on the interface will make more sense.  The text boxes under “Left Image” represent the matrix that is used to process the left image (red) and the boxes under “Right Image” are the same thing for the right image (cyan).  The constants from the above page can just be plugged into them to produce that kind of anaglyph. I’ve got several presets already coded into the program to save some typing (use the Anaglyph Method drop down menu). I’d suggest just loading a preset and playing around with the values to get a feel for what does what.

As input the program needs a crossview 3d picture.  Those are the ones that are viewed by crossing your eyes.  I’ve found a lot on flickr and they seem to work pretty well.
http://flickr.com/search/?q=crossview

If you have any questions, bugs, or just want to heap generous amounts of praise on me, drop a comment in the box.  I’ll be back soon with a review of Braid and further thoughts on GAMMA 3D.  Stay glued to the intertubes.