Multimedia


VLC

VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols. It can also be used as a server to stream in unicast or multicast in IPv4 or IPv6 on a high-bandwidth network.
Website: VLC - http://www.videolan.org/vlc/



MPlayer

MPlayer is a movie player which runs on many systems (see the documentation). It plays most MPEG/VOB, AVI, Ogg/OGM, VIVO, ASF/WMA/WMV, QT/MOV/MP4, RealMedia, Matroska, NUT, NuppelVideo, FLI, YUV4MPEG, FILM, RoQ, PVA files, supported by many native, XAnim, and Win32 DLL codecs. You can watch VideoCD, SVCD, DVD, 3ivx, DivX 3/4/5, WMV and even H.264 movies. 
Website: http://www.mplayerhq.hu


Media Player Classic

Media Player Classic looks just like Windows Media Player 6.4, but has many additional features. It has a built in DVD player with real-time zoom, support for AVI subtitles, QuickTime and RealVideo support (requires QuickTime and/or Real Player); built-in MPEG2/SVCD/DVD codec.
Website: http://sourceforge.net/projects/guliverkli/


Audacity 

AudacityŽ is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems.
Website: http://audacity.sourceforge.net/


Musescore

MuseScore is a free cross platform WYSIWYG music notation program, licenced under GNU GPL.
Website: http://musescore.org/en/


musikCube 

MusikCube is an mp3 player for the modern generation. It helps you just listen to what you want to hear, while offering innovative features not seen elsewhere. For the technical user, musikCube is based on an embedded SQL database engine known as sqlite. For the non technical user, that means its fast. Really fast. "Dynamic playlists" allow fully automatic, randomized playback of songs based on your observed listening habits. The more you listen, the smarter it gets. It also features browsable, user reorderable playlists.
Website: http://www.musikcube.com/


CDex

CDex is a CD-Ripper, extracting digital audio data from an Audio CD. The application supports many Audio encoders, like MPEG (MP2,MP3), VQF, AAC encoders.
Website: http://sourceforge.net/projects/cdexos


Songbird

Songbird is an open-source customizable music player that's under active development.
Website: http://getsongbird.com/