This is a Matroska Playback Pack for minimalists who hate bloated codec packs. It will install only 3 DirectShow filters (Kudos to Gabest and his project guliverkli):
Matroska Splitter 1.0.2.7 (Official version released on 2005-11-25)
VSFilter 2.37 (Official version released on 2005-11-25)
RealMediaSplitter 1.0.1.1 (Official version released on 2005-11-25)
As an option, the installer can also install the newest CoreVorbis (DirectShow filter for Ogg Vorbis), 1.1.0.79 (2005-08-13).
Enjoy the cutting-edge, open-source Multimedia technology.