OpenPHT is described as 'community driven fork of Plex Home Theater (abandoned)' and is an app in the Video & Movies category. There are more than 10 alternatives to OpenPHT for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is Kodi, which is both free and Open Source. Other great apps like OpenPHT are Plex (Freemium), Emby (Freemium), OSMC (Free, Open Source) and JRiver Media Center (Paid).
Plex bridges the gap between your computer and your home theater, doing so with a visually appealing user interface that provides instant access to your media. Plex can play a wide range of video, audio and photo formats as well as online streaming audio and video.
Emby, formerly Media Browser, is a media aggregator plugin for Media Center that takes your recorded, digital, or ripped media and presents it in a simple, easy to use interface. Emby prides itself on delivering a fast, intuitive, media rich experience for the whole family.
Oblecto is a media server, similar to Plex, Emby, Netflix and others. It runs in the background on a home server to index your media such as movies and TV shows to make them searchable and streamable through a REST based interface.