afni.nimh.nih.gov

I've had no problems with it so far, but I'm only using it to view images on my laptop, nothing very computationally intensive. I, however, use Macports instead of fink so I've found it easier to compile it myself periodically. This gets me around the myriad of library problems that can arrise if you try to use Macports, Xquartz, and AFNI.