MKVtoolnix is a collection of programs for creating, editing, and inspecting Matroska (MKV) files. It includes merge tool, header editor, and chapter editor. It can be used to accurately edit chapters; you can specify start/end of chapters with nano-second precision.
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.