Add Piwik for open source Analytics.
Add embeddable social media posts.
Difference between social media, upvotable forum, stack overflow q&a, Disqus, Twitter feed, etc? Can we embed a hashtag thread of Twitter? Embed video playlists and picture albums.
Integrating seminal books with a shopping cart, we can collaborate with various booksellers.
See example from D3D_v20.04.27 on the right. To use this, use Template:Infobox: