My home theater setup depends on the Plex Mac/iOS apps for hassle-free access to both local media stored on my Mac and networked drives and to a variety of online media sources.
While the Mac client is provided free of charge, the universal iPhone and iPad app costs five bucks a pop so many users instead opt for some of the plentiful free alternative solutions offered on the App Store.
That's too bad because Plex comes with a bunch of premium features and is capable of rendering literally any obscure media file type I throw at it. If you've been sitting on the fence, Plex has just sweetened the deal by dropping the iOS app to $1.99...