Spotify sites

Spotify sites
Spotify Statistics: Stats of your playlists and most favourite artists, songs and genres, all in nice designe complete with charts
Shuffle Guru: Something like music dashboard. It shows song you are just playing (and its cover), music controller and lyrics. Very useful for house parties, you can have all the music info on the TV.
Obscurify: Tells you how unique you music taste is in compare to other Obscurify users. Also shows some recommendations.
Spotify.me: Official stats website.
Skiley: Web app to better manage your music and discover new.
Sort your music: Lets you sort your playlist by all kinds of different parameters such as BPM, artist, length and more.
EDIT:
Spotify Charts: Daily worldwide charts from Spotify. Thanks to /u/highreserve for this contribution.
uTrack: Android app which generates playlist from your top tracks. Thanks to /u/malicious_banjo for this contribution.
Spicetify
Spicetify is skin for Rainmeter which brings Spotify experience on Windows on completely new level. UI looks way better and is customizable. You also get bunch of new functions such as the possibility to throw artist to trash can and never listen to him again (very useful if you don't like Drake), better shuffle or integration with Reddit, so you can browse songs and playlists submitted on Reddit directly from the app. It requires Rainmeter to run, but once you set everything up, you don't need Rainmeter for Spicetify to work. It doesn't work with MS Store version of Spotify, you need classic .exe version.
You can get Spicetify here on GitHub and Rainmeter here.
Last.fm sites
I think many of you here on this subreddit also use Last.fm (and if you don't you definitely should, check it out here or visit r/lastfm), so here are some similar sites to them above which use Last.fm data instead of Spotify data.
Last.fm Mainstream Calculator: How mainstream is music you listen to?
My Music Habits: The name speaks for itself
Explr.fm: Shows on map where are the artists you listen to from.
Descent.live: Shuffle Guru with less functions.
Semi-automatic Last.fm Scrobbler: Lets you scrobble along with another Last.fm users.
The Universal Scrobbler: One of the best manual scrobblers out there.
Vinyl Scrobbler: If you listen to vinyl and use Last.fm, this is what you need.
None of these sites (or programs) are my work, I just like to share them because all of them are really cool. All the credits go to authors. I hope you will enjoy them as much as I do.