Unraid
Unraid OS allows you to have ultimate control over your data, media, applications, and desktops, using just about any combination of hardware.
HTPC
tinyMediaManager
A multi OS Media Manager
DVDPatcher 1.06 Free Download - VideoHelp
DVD Patcher is a tool to change the video headers in mpg/mpeg2/vob video. Change aspect ratio, framerate, resolution/size and bitrate.
MKVToolNix news – Matroska tools for Linux/Unix and Windows