License: Open Source (GNU General Public License, version 2)
Description: DCP-o-matic is a free, open-source program to create Digital Cinema Packages (DCPs) from videos, images, sound and subtitle files. You can use it to make content for playback on DCI-compliant cinema projectors.
It can take files in many different formats, including MP4, Apple ProRes, MOV, AVI, M2TS (from Blu-Ray), VOB (from DVD), WMV, MKV, JPEG, PNG, TIFF and lots of others.
Website: DCP-o-matic Free, open-source DCP creation from almost anything
I may give it a go at some point in time, I use it for one of my jobs.
However it is a very niche program with not a great deal of reason to be portable. Plus my Windows PC is not in the best shape right now due to a failing video card. So it might be a little while before I get to it, if I get to it.