iScream is a freeware application for Mac OS X. It is designed to record audio from microphone, line-in or another input audio device easily. And save it in MP3, AAC or WAV format. The main idea of this application is to sit in the dock and wait for a click. Just click on dock icon to start recording. To stop click on dock icon again. So it's good for a voice records, voice notes and other voice recording things.
OS X 10.5 or later