The Zenwalk User Repository

atk bzip2 coreutils cxxlibs directfb expat file flac fontconfig freetype gcc gcc-g++ glib2 gtk+2 libdrm libebml libjpeg libmatroska libogg libpng libtiff libvorbis mesa ncurses pango pcre perl popt libmikmod sdl wxgtk xorg zlib  

MKVToolnix is a set of tools to create, alter and inspect Matroska files. They do for Matroska what the OGMtools do for the OGM format and then some.