1) StumbleUpon
http://stumbleupon.com/
2) Digg
http://digg.com/
3) Reddit
https://www.reddit.com/
4) Shalshdot
https://slashdot.org/
5) Scoop.it
https://www.scoop.it/
6) Pocket
https://getpocket.com/
7) Folked
http://www.folkd.com/
8) Dribble
https://dribbble.com/
9) DZone
https://dzone.com/
10) SlideShare
https://www.slideshare.net/
11) Dribbble
https://dribbble.com/
12) We Heart It Inspiring
https://weheartit.com/
13) Pinterest
https://in.pinterest.com/
14) Drew Curties FARK.com
https://www.fark.com/
15) Pearltrees
https://www.pearltrees.com
16) Quora
https://www.quora.com/
17) Fiverr
https://www.fiverr.com/
18) StumbleUpon/Mix
https://mix.com/
19) Pocket
https://getpocket.com/
20) Digg
http://digg.com/
21) Folkd
http://www.folkd.com/
22) Slashdot
https://slashdot.org/
23) Scoop.It
https://www.scoop.it/
24) Diigo
https://www.diigo.com/
25) BibSonomy
https://www.bibsonomy.org/
26) DZone
https://dzone.com/
27) Flipboard
https://flipboard.com/
28) Feedly
https://feedly.com/i/welcome
29) Instapaper
https://www.instapaper.com/
30) LinkaGoGo
http://www.linkagogo.com/
31) Disqus
https://help.disqus.com/
32) Tumblr
https://www.tumblr.com/
33) Flickr
https://www.flickr.com/
34) Snapchat
https://www.snapchat.com/
35) Quora
https://www.quora.com/
36) Periscope
https://twitter.com/Periscope
37) StumbleUpon
https://www.stumbleupon.com/
38) Viber
https://www.viber.com/
39) Weibo
https://www.weibo.com/signup/signup.php
40) Ask.fm
https://ask.fm/
41) Meetup
https://www.meetup.com/
42) Yelp
https://www.yelp.com/
43) Buffer
https://buffer.com/
44) Sendible
https://www.sendible.com/?afmc=163
45) Unsplash
https://unsplash.com/
46) Canva
https://www.canva.com/
47) Agorapulse
https://www.agorapulse.com/
48) IFTTT
https://ifttt.com/
49) Animoto
https://animoto.com/
50) SEMRush
https://www.semrush.com/