Lidarr - Lidarr is a music collection manager for downloading and organizing music libraries.
Headphones - Automatic music downloader for SABnzbd. Headphones is an automated music downloader for NZB and Torrent, written in Python. It supports SABnzbd, NZBget, Transmission, µTorrent, Deluge and Blackhole.
Muzione - Muzione is a streaming music service.
Lacey - Free Music & Video Downloader
MP3base - MP3box - free mp3 search and download, stream music online for free, play tons of artists, albums and songs without registration.
Mp3Bear - Mp3Bear is an Mp3 music search engine that locates the mp3 files all over the net.