What is the hottest tool for merging a HDR (Mac)

Asked by wilhel1812 (2877) August 13th, 2010 from iPhone

I just took the good old DSLR out for a walk today, and i have some material for a nice HDR photo ready for merging. I haven’t done this for a while, so i was wondering; what is the hottest tool for merging a HDR? Apps, plugins and Photoshop tutorials welcome!