FFmpeg
FFmpeg is a complete solution to record, convert and stream audio and video.
LAME
LAME is a high quality MPEG Audio Layer III (MP3) encoder licensed under the LGPL.
CD-DA X-Tractor
CD Ripper for 32-bit Windows platforms (95/98/NT/2000).
Audacity
Audacity is a free, easy-to-use and multilingual audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems.
PeerCast
PeerCast is a simple, free way to listen to radio and watch video on the Internet.
MusicBrainz Tagger
Picard is the next generation MusicBrainz tagging application.
split3pm
split3pm is a tool to extract music segments from a larger MP3 file.
GNUMP3d
GNUMP3d is a streaming server for MP3s, OGG vorbis files, movies and other media formats.
Ogg Vorbis
Ogg Vorbis is a completely open, patent-free, professional audio encoding and streaming technology with all the benefits of Open Source.
BonkEnc
BonkEnc is a free audio converter and CD ripper which integrates various popular formats and encoders.
Open Sound World
Open Sound World, or OSW, is a scalable, extensible programming environment that allows musicians, sound designers and researchers to process sound in response to expressive real-time control.
Mixere
Mixere is a free, open-source application for mixing audio files.
Mp3splt
Mp3Splt-project is a utility to split mp3 and ogg files selecting a begin and an end time position, without decoding.
Musepack
Musepack is an audio compression format with a strong emphasis on high quality.
CDex
CDex is a CD-Ripper, extracting digital audio data from an Audio CD.
Groovebox Manager 303 (MC303)
GBM-303 communicates with the Roland MC303 Synthesizer over a midi connection.Its main feature is the ability of storing and managing your user patterns on your computer.You can even share your patterns all over the world.