Audiozilla is audio converter software that works via a right-click.
Audio Converter: Convert audio between almost any formats: MP3, M4A, AAC, OGG, WMA, FLAC, AU, WAV, AIFF, MP2, AC3, AU, APE, MPC, MOD, VOC, CAF, RAW, PCM, GSM, VOX, WV
Extract Audio from Video: Select and convert audio from video files MP4, M4V, WMV, ASF
Extract Audio from Audio CD: Select and convert audio from audio cd tracks. Automatically looks up track info and names the converted tracks.
Mobile devices audio converter: Convert audio files for your mobile phones
Right-click Convert: Easiest way to convert audio file(s). Just right-click and convert.