WordPress.com has offered their own Like button for a while now.
They have now rolled out some major updates to this functionality across their network.
Here are the new changes:
1. You can now show the Like button on pages, media pages, front page, archive pages and even search results!
2. The Like button is now even available on media files shared through blog posts.
3. Users can access the content they have liked from their own dashboard. WordPress.com has also added this view on all their mobile apps.