Think global: top 21 social media sites & apps worldwide

I just came across this great list of the top 21 social media sites & apps worldwide:

1. Twitter
2. Facebook
3. Linkedin
4. Xing
5. Renren
6. Google+
7. Disqus
8. LinkedinPulse
9. Snapchat
10. Tumblr
11. Pinterest
12. Twoo
13. MyMFB
14. YouTube
15. Instagram
16. Vine
17. Whatsapp
18. VK.com
19. Meetup
20. Secret
21. Medium

Here you find the original article by socialmediatoday.com