Adding scripts is one method used to extend Foobar’s abilities. Not only are there quite a few existing useful scripts, new custom scripts can be written. One great script is the Biography script which displays biography and rating information from both AllMusic and Last.FM
Denemo is a free music notation program for GNU/Linux, Mac OSX and Windows that lets you rapidly enter notation which it typesets using the LilyPond music engraver. Music can be typed in at the PC-Keyboard, played in via MIDI controller, or input acoustically into a microphone plugged into your computer’s soundcard.
Opus is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors. Opus replaces both Vorbis and Speex for new applications, and several blind listening tests have ranked it higher-quality than any other standard audio format at any given bitrate until transparency is reached, including MP3, AAC and HE-AAC. ~ Wikipedia
Free application that converts audio files to MP3, AAC, AC3, WMA, FLAC, M4A, OGG, WV, AIFF or WAV format. Moreover, the program allows extraction of audio tracks from video files without loss of sound quality. Supported input formats: over 70 audio and video formats, including AVI, MP4, MP3, MOV, FLV, 3GP, M4A, MKV, WMA.