MKVToolNix is a small collection of tools that allows you to manipulate Matroska (MKV) files in several ways. You can use this program to create, split, edit, mux, demux, merge, extract or inspect Matroska files. The program will also work with other video formats (AVI, MPEG, MP4, MPEG, Ogg/OGM, RealVideo, MPEG1/2, h264/AVC, Dirac, VC1) including some video codecs, audio and also most subtitle formats.
Acrobat Distiller 
Adobe Photoshop 
CardScan 
Selfish Net 
iVMS 4200 
uPLAY by Ubisoft 
Hard Time
Huma Zainab
It's really amazing and good-working.
Guest perfect. intuitive, does everything for combining or stripping audio, video and subtitles in matroska format.
if they add in ability for more video types to be muxed into mkv container it will be even more perfect.