MoreIchatEffects is a collection of 56 effects for iChat and Photobooth.
With MacOS X 10.5 and 10.7 all of them work. On 10.6, please update your system with the 10.6.2 minimum. When you save a picture with Photobooth, the colors are inversed on some effects. It's a known bug but it isn't fixed with 10.6.8 (only with 10.7). This effects are available for Intel processor. Some could be supported by PowerPC G4 or G5 in Photobooth or Ichat.
What's new in version 2.0.5
The release 2.0.5 add the support of MacOS X 10.7 (Lion)