iSoundFile is a Cocoa frontend for libsndfile. It makes use of many of the features provided by this library and offers a comfortable GUI for them. The source code is released under the GPL. There is also support for file playback which supports CoreAudio for output and purely uses libsndfile's routines to read the contents of the file.
Focus stacking combines multiple images into one composite, used in macro/microscope photography & landscape.
