MKVToolnix - MKVToolnix is a set of tools to create, alter and inspect Matroska files under Linux, other Unices...
MKVtools - MKVtools was primarily designed for processing mkv files for use in DivX enabled DVD players...
MKVCleaver - MKVcleaver is a GUI (Graphical User Interface) for mkvtoolnix, designed to extract data from MKV...
Subler - Subler is a Mac OS X application that opens media containers, allows you to add or remove media...
MY MP4BOX GUI - My MP4Box GUI is a Graphical User Interface for the well-known command line tool mp4box.
MkvToMp4 - MkvToMp4 can change the mkv/m2ts/mts to Mp4 without reconverting/transcoding video(If the original video in H264 format). Support for multiple internal and external audio tracks.