PhotoAcute Studio has just been updated to version 2.7.4. The primary addition is the ability to stack photos to add depth of field. Which brings us to why you might want it: this unique program is a stacking wizard: stack photos to remove noise, stack photos to increase resolution, stack photos to remove things that move, stack photos to increase dynamic range, and now, stack photos to add depth of field. Of course, you have to photograph with that intention, but this product can do things that are very useful with a little planning. Oh, and did I mention it can do geometric and aberration correction? Windows, Linux, and Mac versions are available.