Kodi Multimedia app
Kodi is open source media center previously known as XBMC. It is free cross-platform entertainment hub and media player for Android. The app let you play all kind of audio and video content straight on android device.
It is separated in four categories: video player, audio player, image viewer and weather forecast. All of them are packed in nice app with sleek and easy to use interface.
You can download and use different add-ons to watch videos from more websites. They can be used to stream content from some sites. You can add images from google search to your library and play them. As one of the best multimedia centers for Android, it will play any media file imaginable.
It is highly customizable media player. Any digital media file can be played no matter of codecs or platform. It also supports uPnP/DLNA and AirPlay which makes it great from streaming content from other device.