Best Foot Forward provides an easy way for you to automatically create a featured post list using Wordpress tags like "featured", "favorite", etc.
This plugin provides a widget with several options to list a StumbleUpon user's favorite/liked pages.
Adminyo is a powerfull time-saving admin toolbox with some extraordinary capabilities.
Allow users to keep a list of favorite listings.
Adds custom lists to EDD Wish Lists
This plugin adds a readinglist where registered users can add and delete favorite articles. The list is accessible from any page on the website.
Go Dash gives you super fast access to your recently viewed pages and lets you open them with ease from anywhere on your site.
You can create a favourite list of pages or posts or WooCommerce product page in an easy and faster way.
Change "Howdy" and add more links to the Favorites drop-down
Islamic Library plugin contains books, articles, fatwa, videos, quran, poster, cards, apps, MP3, download, news and torrent in more than 130 languages
A social reactions ( comments, like, favs, etc. ) importer.
Widget showing video thumbnails of recent videos from a YouTube channel or
playlist.
This plugin allows your users to save their favorite content, and keep track of their favorites (add or remove), other user's favorites and clicks on favorites.
Add Favorite or any flag button to your posts. The easy way
Save user's favorite posts and list them.
A free, full-featured rating plugin that also live-mirrors your posts at Thumbar.com to boost your traffic.
Setup Twitter feeds to pull a user's public timeline, public list, favorite tweets, or a custom search term, phrase, or hashtag.