I just unarchived adn rename folder and zipped this softwares excludes dvdauthor.
dvdauthor programs is come from DVDstyler which license is GPL.
Anyway read readme or license before you use them.

sox
http://sourceforge.net/projects/sox/

mpc
http://sourceforge.net/projects/guliverkli/

pngquant
http://www.libpng.org/pub/png/apps/pngquant.html

optipng
http://optipng.sourceforge.net/

MediaInfo
http://mediainfo.sourceforge.net/ja

vlc
http://www.videolan.org/vlc/

flvtool2
http://rubyforge.org/projects/flvtool2/

dvdauthor
http://dvdstyler.sourceforge.net/

VirtualDub
http://www.virtualdub.org/