Facebook

Like (JS)Like (iframe)
Like button (JS)
Share (JS)Share (iframe)
ShareShare button (JS)
SaveComments
Save button
Comments (JS)
Embedded video (JS)Embedded video (iframe)
Embedded video (JS)
Embedded comment (JS)Embedded comment (iframe)
Embedded comment (JS)
Embedded post (JS)Embedded post (iframe)
Embeded post (JS)
Embedded page (JS)Embedded page (iframe)
Facebook
Page plugin (JS)

LinkedIn

ShareFollow Company

Twitter

TweetFollowEmbedded timelineEmbedded tweet

YouTube

Video (iframe tag)Video (IFrame Player API)
Video (IFrame Player API)
PlaylistSubscribe button
Subscribe button

Disqus

Comment threadComment count
Link.