If you are into streaming your own TV shows and movies, checking out Plex Media Server at https://www.plex.tv/about/ is a must. The free product will work for most but this is a product that I believe deserves support so consider a Plex Pass at https://www.plex.tv/plex-pass/

If you are into managing your own music collection and want to listen to it anywhere Plexamp is a hidden gem.