Yes, and there's also Kodi with its various PVR plugins, which is actually a pretty great and completely customizable UI. But that's a bit of a pain to configure too.

Plex offers everything in a single package, with two distinct advantages. First, it's client/server and will stream your programs anywhere over the internet. And second, it has great fully supported apps for every platform under the sun-- and if you don't like the apps its web UI is fabulous too! But, not open-source or free.