Sertifier - Best way to send smart certificates & open badges!
Lark Player - Lark Player – YouTube Music & Free MP3 Top Player is a fine tool developed by Mobiuspace Tech Top Player.
Certopus - Design & Deliver verifiable certificates
Audiomack - The free SoundCloud alternative
Credly - Used to post and verify educational credentials
Musicolet - Musicolet is a small yet feature-rich offline Music Player for Android.