Android: Movie streaming service Popcorn Time has had some trouble staying in business (for obvious reasons), but it's back on Android with a free, open source app that streams movies directly to your device.
The service works by downloading torrents in the background while you watch. As with any service like this, both legal films as well as illegal, copyrighted movies show up, so it's up to you to decide how you use it. Unlike the web-based versions of the last couple months, though, it won't be as easy to pull the plug on an open source app.
Popcorn Time [Google Play Store]