Andromeda turns collections of MP3s into fully-featured streaming Web sites. Many other file formats are supported, including: WMA, OGG, MPG, AVI, and WMV. It can be used as a personal jukebox on a local network or over the Internet (bandwidth permitting). It works well with PHP-Nuke, PostNuke, and phpWebSite. Additional features include skins, custom playlists, logons/accounts, and a search tool. Andromeda is also multilingual, speaking English, German, Russian, Dutch, Spanish, and many other languages. No database is required. ASP and PHP versions are available.
Audacity is a cross-platform multitrack audio editor. It allows you to record sounds directly or to import Ogg, WAV, AIFF, AU, IRCAM, or MP3 files. It features a few simple effects, all of the editing features you should need, and unlimited undo. The audio I/O uses PortAudio, which fully supports OSS, Mac OS X CoreAudio, and Windows WMME, and can be compiled with support for ALSA and Jack.
AudioMove is a handy GUI-based batch audio file converter/copier program. It can convert various audio file formats to WAV or AIFF format (using libsndfile), and do high-quality sample-rate conversion at the same time (using libsamplerate). It is multi-threaded for maximum throughput, can handle thousands of files per batch, and does recursive directory scans.
AudioSlicer is a Cocoa GUI application that finds all silences in an audio file and allows you to split it into several smaller audio files and to name/tag them properly. While most other tools split automatically according to certain criteria, AudioSlicer shows you all silences within a certain range of duration. You can then listen and decide whether you want to split there. The splitting is done without loss; there is no decoding and re-encoding of audio data.