sView for Android is an open-source viewer for stereoscopic files (images and videos) supporting output in Anaglyph Side-by-side Over-Under and Interlaced formats.

Limited hardware acceleration for decoding the video is disabled by default (see options if playback is too slow on device).
User interface is optimized for tablets in horizontal layout but program can be used on a phone as well.

sView can display 360-degrees panoramas stored in spherical or cubemap format (both - videos and images in stereoscopic and mono formats) with device orientation tracking.

sView is also available on desktop platforms.
Please refer to the official site for more information about program features:
http://www.sview.ru/en/

and to the git repository for source code:
https://github.com/gkv311/sview