A CLI utility and Python module which, when given a language and a filename, goes out and tracks down subtitles for it.

It's in the Debian package repos but as a Python module only. You have to install it from Pypi if you want the CLI utility.

The documentation leaves much to be desired and the only way to find a sample config file is to poke around in the repo.

Another massive archive of subtitles for personal media.

Distinct from opensubtitles.org.

A massive archive of subtitles in over a dozen languages for personal media.

Distinct from opensubtitles.com.