AudioFinder is an advanced sample management system for Mac OS X complete with full AudioUnit support.

Features:

Intuitive Design and Easy to Learn.
Audio CD Sample Extractor.
Full AudioUnit Plugin Support (processing and playback).
AudioUnit Presets menu.
Plug-In Manager.
Batch Processing.
Create EXS Instruments with one click.
ToneFinder reference tone generator.
DelayFinder BPM/Note millisecond calculator.
Convert to main PCM formats.
Convert to any iTunes supported formats.
ReCycle playback.
Export REX as AIFF.

Waveform Overview with measure markers.
Max Peak detection and display.
Integration With Mac OS Finder (colors, comments and more...).
Drag and Drop support for quick playing.
Playback history (never loose track of sounds).
MIDI keyboard input.
Instant Sound Preview.
Instant Pitch Control With Mini-Keyboard.
Pitch Analyzer.
Loop BPM Detection With Auto-rename.
Scale loops to a specific BPM.
BPM Tap Pad.
Tuning Fork for finding pitches.
Fast Sound Scanning.
Scan Sets.
Advanced Sound Searching System.
Regular Expression searching.
Generate detailed reports for importing into spreadsheets and databases.
Power File Renaming.

Bookmarks and Navigation Tools.
Tools For Helper Applications.
Favorites Directory.
Autopilot Play with Shuffle Mode.
Play standard MIDI files through the build in DLS synth.
Sysex Transmission to manage MIDI Sysex data.
PCM File Format Conversion.
AudioFinder supports the AAC, MP3, AIFF, AIFC, WAV, SD2, REX, RX2, MIDI and SYX formats, the primary formats for all professional music software.
32-bit Floating Point DSP Utilities.
iPod support - can play and copy files from iPods.
CoreAudio, AudioUnit and CoreGraphics based.
G4 and G5 Optimized.
and more...