b/w colorizer - iMovie plug-in makes clips greyscale.
Version: 1.1.0b/w colorizer is a general effects plug that lets you convert your clip to "black-and-any-color".
Operating System: Mac OS X
You set a color (e.g. yellow), and the plug will convert your clip to a monochrome yellow clip (i.e. it uses only shades of yellow). think 'sepia tone' effect, except you get to pick the color tone.