Loop YouTube videos, and control how long you want to play a YouTube video for.
Lark Player - Lark Player – YouTube Music & Free MP3 Top Player is a fine tool developed by Mobiuspace Tech Top Player.
FacePause - Look away to pause YouTube videos
Audiomack - The free SoundCloud alternative
ListenOnRepeat - 24/7 curated music streams
Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.
SongFlip - SongFlip – Free Music Streaming and Player is one of the most popular free music streaming apps, that allows you to get access to millions of songs right over your cell phones.