Resonic is a slick audio player and browser / directory player, built around a big waveform view/frequency analyzer.
It plays music files, sounds, and samples out of existing folder structures. It's built to be fast, reliable, and powerful, without the bloat, but with exceptional usability.
Resonic is handy for wading through large numbers of audio files. It can be used and understood by anyone, but also comes with features for advanced users and audio professionals.