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
WhatsMac - WhatsApp for Mac
Spotalike - Spotify playlist with similar songs, according to Last.fm
WhatsApp Chatbots by SendPulse - No-code chatbots and shared inbox for WhatsApp
Playlist Machinery - Tools that help you create & organize your Spotify playlists