MPlayerXP - MplayerXP is branch of the well-known mplayer which is based on a new, thread-based core. The new core provides better CPU utilization and improves performance of video decoding. - http://mplayerxp.sourceforge.net/
LINGOT is Not a Guitar-Only Tuner - GPL musical instrument tuner, originally conceived to tune electric guitars. - http://www.nongnu.org/lingot/
OpenQuicktime - An opensource multimedia library to play, edit and author Apple Quicktime movie files. - http://www.openquicktime.org
Art of Illusion - Art of Illusion is a 3D-modeller, renderer and raytracer. It is written in Java and runs on Linux, Solaris, OS X, Windows and probably more. - http://www.artofillusion.org
Cinelerra - Cinelerra is a full-featured non-linear video editor for Linux. - http://heroinewarrior.com
Cthugha Development Page - "An Oscilloscope On Acid" - Cthugha also lets you save certain visualizations to keystrokes which makes it a great tool for VJs. - http://www.torps.com/Cthugha/
The Linux MP3-HOWTO - The Linux MP3-HOWTO. - http://www.tldp.org/HOWTO/MP3-HOWTO.html
Ice Sound Manager for IceWM - Ice Sound Manager is a Gtk-based sound events and sound theme manager for IceWM that does not require Gnome. - http://icesoundmanager.sourceforge.net
Matan Ziv-Av - zgv, svgalib, and other Linux projects. - http://www.cs.bgu.ac.il/~zivav/