Image stackers

Although Zerene is not generally well known, it is really a wonderful software. Those who conduct macro and micro photography are well familiar with Zerene. It has some technology that even Helicon doesn't have. I wouldn't say the software itself is as polished looking as Helicon, but it really gets the job done. Also, when comparing prices, consider Zerene's cost includes retouching. And retouching is necessary a lot of times, particularly with macro images. If that all isn't enough, the gentlemen who created the software answers questions directly and promptly.
Ken