dtsdec libdts (http://www.videolan.org/dtsdec.html)
dvdnavsrc libdvdnav (http://dvd.sourceforge.net/)
dxr3 (http://dxr3.sourceforge.net/)
-icecastsend libshout (http://www.icecast.org)
mad libmad (http://www.mars.org/home/rob/proj/mpeg/)
mpeg2dec libmpeg2 (http://libmpeg2.sourceforge.net/)
mpeg2enc libmpeg2enc (http://mjpeg.sourceforge.net/)
Plugins which use a LGPL library are as follows:
alsa alsa (http://alsa-project.org/)
-artsdsink aRts (http://arts-project.org/)
cacasink libcaca (http://sam.zoy.org/projects/libcaca/)
-colorspacelcs libcolorspace
dvdec libdv (http://libdv.sourceforge.net/)
esdmon,esdsink libesd (ftp.gnome.org/pub/GNOME/stable/sources/esound/)
faac libfaac (http://www.audiocoding.com/modules/mydownloads/)
ffmpeg ffmpeg (http://ffmpeg.sourceforge.net/)
gdkpixbuf GTK+ (http://www.gtk.org/)
gnomevfs gnome-vfs (ftp.gnome.org//pub/GNOME/stable/sources/gnome-vfs/)
-gst_arts aRts (http://arts-project.org/)
gst1394 libraw1394 (http://www.linux1394.org/)
gstaf libaudiofile (http://www.68k.org/~michael/audiofile/)
gstsf libsndfile (http://www.mega-nerd.com/libsndfile/)
-hermescolorspace Hermes (http://www.clanlib.org/hermes/)
kio KDE (http://www.kde.org/)
ladspa (http://www.ladspa.org/)
lame libmp3lame (http://lame.sourceforge.net/)
qcamsrc
rfbenc librfb
sdlvideosink libsdl (http://www.libsdl.org/)
-shout2send libshout2 (http://www.icecast.org)
smoothwave
swfdec (http://swfdec.sourceforge.net/)
tarkin (http://svn.xiph.org/trunk/tarkin/)
- license PNG license
Plugins using non-free libraries:
-divxdec, divxenc (http://www.divx.com/)
osxaudio (http://www.apple.com/macosx/)
sunaudiosink (http://www.sun.com/)