PopcornTime is an app built upon web technology (Electron) for streaming contents via bittorrent. It was shutdown in March 2014.
Popcorn Time Shuts Down, Then Gets Resurrected by YTS (YIFY) - TorrentFreak
PopcornTime.io was the PopcornTime fork backed by the original team. It was shutdown in October 2015.
Popcorn Time Chaos Leads to Shutdown - TorrentFreak
The core technology was forked as Butter Project. Sources will be implemented as add-ons (like the Kodi project).
Butter Project - Watch movies and TV shows instantly!
Use TV endpoint http://eztvapi.co.za/ for now.
Time4Popcorn (popcorn-time.se) was the other fork but embeds adware.