MConverter - Online batch converter for most video, audio, image, e-book, document and archive file formats. Easy to use. No full-screen ads. Select files and folders from anywhere, including the clipboard (Ctrl+V). Save your files to any folder of your choosing.
MKVtools - MKVtools was primarily designed for processing mkv files for use in DivX enabled DVD players...
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.
MKVToolnix - MKVToolnix is a set of tools to create, alter and inspect Matroska files under Linux, other Unices...
WinX Video Converter - WinX Video Converter is a totally free SD/HD video converter software for Windows 10/8/7/Vista/XP.
Free MKV Converter - Convert MKV to Any Video/Audio Formats and Convert to MKV