AllToMP3 is a desktop application to download and convert YouTube, SoundCloud, Spotify and Deezer in 256 kb/s MP3, with tags: cover, title, artist, genre, and even lyrics!. It supports YouTube playlists, Deezer and Spotify playlists, and also integrate a search engine so you can simply specify a song name or an album and AllToMP3 will download it.
Read about AllToMP3 's features, license, platforms, and more.