OpenPictureSpace displays a directory full of pictures in a thumbnail list view. It can displays jpeg, gif, png and iff ilbm pictures (including HAM and EHB specific Amiga modes). Other image viewers build a n x m grid with thumbnails. In contrast this soft scales images only vertically and places as many images into a line as possible. So the screen space is optimized for a maximum number of thumbnails.
Original web site.
MorphOS port with enhancements (sources modified included) and a picture grab available
here.
Click on read more for more info.