Audio and Video

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• GNUsound   
  GNUsound is a multitrack sound editor for GNOME 1 and 2. [Linux] GNU license.
  
  http://www.gnu.org/software/gnusound/

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• Icecast   
  The project Icecast is a collection of programs and libraries for streaming audio over the Internet. [Linux and Windows] GNU GPL
  
  http://www.icecast.org/

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• ALSA   
  The Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the Linux operating system. GNU General Public License
  
  http://www.alsa-project.org/

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• AlsaPlayer   
  AlsaPlayer is a new type of PCM player for Linux and UNIX. (C, C++) GNU General Public License (GPL)
  
  http://www.alsaplayer.org/

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• Grip   
  Grip is a cd-player and cd-ripper for the Gnome desktop. It has the ripping capabilities of cdparanoia builtin, but can also use external rippers (such as cdda2wav). It also provides an automated frontend for MP3.GNU License.
  
  http://www.nostatic.org/grip/

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• Speex   
  Speex is an Open Source/Free Software patent-free audio compression format designed for speech, complementary to the Ogg Vorbis code. BSD license.
  
  http://www.speex.org/

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• Paranoia   
  Robust CD audio extraction. [Linux] BSD License
  
  http://www.xiph.org/paranoia/

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• Vorbis audio compression   
  Ogg Vorbis is a patent-and-royalty-free, general-purpose compressed audio format for mid to high quality (8kHz-48.0kHz, 16+ bit, polyphonic) audio and music at fixed and variable bitrates from 16 to 128 kbps/channel.
  
  http://www.xiph.org/vorbis/

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• Theora Video codec   
  Free Video Compression.
  
  http://theora.org/

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• FLAC   
  Free Lossless Audio Codec. Xiph's variant of the BSD License
  
  http://flac.sourceforge.net/

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• VirtualDub   
  VirtualDub is a video capture/processing utility for 32-bit Windows platforms (95/98/ME/NT4/2000/XP), licensed under the GNU General Public License (GPL).
  
  http://www.virtualdub.org/

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