GreyToRGB lets you combine three 8bpp (bits per pixel) Clear or AIM files together, representing red, green and blue to produce one 24bpp Clear file. It will also work the other way too, separating out a 24bpp Clear file into a directory ofred, green and blue Clear files.

I find this utility useful for applying effects to and creating images and when coupled with AIM you can generate some seriously weird images!