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The Ugly Truth About Spotify Is Finally Revealed
(www.honest-broker.com)
This is a most excellent place for technology news and articles.
Slskd - https://github.com/slskd/slskd/
It uses the soulseek network (an old favourite of mine) installed though docker accessible through a browser.
If you want a desktop app, I recommend Nicotine+ for Linux or visit https://www.slsknet.org/news/node/1 for Windows.