WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Magic Playlist - Get the playlist of your dreams based on a song
RELE.AI - RELE.AI is the first enterprise Virtual Bot Assistant, allowing you to document client conversations and interact with your CRM without ever leaving WhatsApp (desktop & mobile).
Spotalike - Spotify playlist with similar songs, according to Last.fm
BetterChat for WhatsApp - Gorgeous new full-featured WhatsApp client for the Mac.
Playlist Machinery - Tools that help you create & organize your Spotify playlists