What open source solution powers your entertainment media center?

I personally use an old desktop machine next to the router with Plex Server installed on it, 2 2tb drives of films and TV shows and a Chromecast, with the plex app on my android phone which links up the two.

I just browse the plex app for stuff I wanna watch, click cast and then voila! On demand TV and films, wirelessly, without having to move my arse off the couch.

What a time to be alive.