Open-source
AllToMP3: Download and Convert Music from YouTube, Spotify, and SoundCloud (Free)
AllToMP3 is a highly versatile desktop application that offers its users a comprehensive platform for downloading and converting their favorite music from popular sources such as YouTube, SoundCloud, Spotify, and Deezer. The application is capable of converting audio files into high-quality 256 kb/s MP3 format, while also providing users