FREELinkedIn Like lets you Like any company on LinkedIn.com. The Kynetx application can be installed as a browser extension available for Firefox, Chrome and Internet Explorer. This app blurs the lines between two social networks by seamlessly connecting them together. LinkedIn_Like won the Kynetx Facebook contest in Nov 2010.
FREEDiscover where your friends hang out on the social web. Hoverme gives you instant access to the social web profile of each of your friends. The profile contains links to their profiles on sites such as Facebook, LinkedIn, Flickr, Delicious and many more.
FREEKeep in touch with those who are closest to you on Facebook by always including their latest news in your news feed.
FREEShow Me First!™ is a sharing preview tool that lets you see what you're about to share with Facebook Connect before you share it with a Facebook App or Facebook Connect website.
FREEHide foul language on Facebook.com
FREEThis app will give you a list of your latest facebook updates, no matter what page you are on!
FREEFacebook Unfriend Finder by Edouard Gatouillat
FREELike All, Love All! The Facebook Like Button is everywhere, almost. With LikePlus you can share the content you like on Google, Twitter and LinkedIn. LikePlus integrates Facebook Like into your Google search results, Twitter stream and LinkedIn company profiles.
FREEThis app adds "Send buttons" to every site on the internet. On certain sites, it will add more than one per page. It will appear in the Top-Left corner of your browser. The Send button allows you to send the article to your facebook friends, or you can even enter an email address (in case you want to share with someone not on your friends list). To me, the Send button is much more useful than the Like or Share buttons. So please, start Sending.
FREEAdds Facebook Send feature on : Google Reader Wordpress.com Blogs Blogger Blogs Posterous Search Results (Google, Yahoo!, Bing) Yelp Google Places
FREEPlusOneAnywhere includes a Google +1 button on Google News , Google Reader, Empire Avenue, Amazon, Ebay, many Wordpress blogs, many posterous sites, Yelp, Google Places, Google/Yahoo/Bing search engine results, many blogspot blogs , Wingcash ... If a Facebook like button is present then GooglePlusOneAnywhere will detect it add a +1 button next to it. When GooglePlusOneAnywhere can't place a +1 button neetly it will still be available on the left of the screen. Please give feedback ! :-) https://convore.com/feedback-sendanywhere/
FREEPost Google+ status updates to Facebook simultaneously.
FREETired of the list of friends on the side of Facebook having so many of your friends who aren't actually online? This app hides those so you see only the ones you can actually chat with.
FREEGet Facebook friend photos, not advertisements