There's also ZereneStacker. You'll still have to do touch up in places where it doesn't quite stack well. I've only used it on land with a tripod. Works well for flowers but parts of small animals sometimes look slightly misaligned.
Hi all, Great to see that there's a successor to Wetpixel and so many folks from that site are here now. I live in the SF Bay Area but these days most of my diving is overseas rather than Monterey. Hope to see some of you out there. Rinjani