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Get flash to fully experience Pearltrees
Get a combined Like and Send button http://developers.facebook.com/docs/reference/plugins/send/

Send Button - Facebook Developers

http://developers.facebook.com/docs/reference/plugins/live-stream/ The Live Stream plugin lets users visiting your site or application share activity and comments in real time. Live Stream works best when you are running a real-time event, like live streaming video for concerts, speeches, or webcasts, live Web chats, webinars, massively multiplayer games.

Live Stream - Facebook Developers

http://developers.facebook.com/docs/guides/mobile/ Over 425 million users access Facebook from a mobile device every month.

Mobile Apps - Facebook Developers

http://developers.facebook.com/docs/reference/plugins/comments/

Comments - Facebook Developers

Comments Box is a social plugin that enables user commenting on your site. Features include moderation tools and distribution. Social Relevance: Comments Box uses social signals to surface the highest quality comments for each user.

Like Button - Facebook Developers

standard - displays social text to the right of the button and friends' profile photos below. Minimum width: 225 pixels. http://developers.facebook.com/docs/reference/plugins/like/
With animation, offline capabilities, audio and more, HTML5 yields a new class of web standards enabling developers to build amazing products. The Resource Center helps you build your web app. Learn more http://developers.facebook.com/

Facebook Developers

for Websites - Facebook Developers

https://developers.facebook.com/docs/guides/web/ Social Plugins are the easiest way to get started with Facebook Platform.
This sample outlines how to build a social web site with the following features: Like Button , Activity Feed , Recommendations , Comments Box and Open Graph Protocol . This sample outlines how to build a Facebook Canvas Application with the following features: JavaScript SDK , Social Plugin ( Login with Faces ), Platform Dialogs , Graph API using OAuth 2.0 and Real-time Updates https://developers.facebook.com/docs/samples/

Samples & How-Tos - Facebook Developers

Over 425 million users access Facebook from a mobile device every month. Facebook Platform lets you bring these users and their friends to your mobile apps, creating a more engaging and personalized experience for your users. Cross-platform. https://developers.facebook.com/docs/guides/mobile/

Mobile - Facebook Developers

Page Tab Tutorial - Développeurs Facebook

https://developers.facebook.com/docs/appsonfacebook/pagetabs/ Facebook Pages are a heavily used feature of Facebook.

Apps on Facebook.com - Développeurs Facebook

Building an app on Facebook gives you the opportunity to deeply integrate into the core Facebook experience. Your app can integrate with many aspects of Facebook.com, including the News Feed and Notifications.
Building an app on Facebook gives you the opportunity to deeply integrate into the core Facebook experience.

Apps on Facebook.com - Développeurs Facebook

Apps on Facebook.com - Facebook Developers

Building an app on Facebook gives you the opportunity to deeply integrate into the core Facebook experience. Your app can integrate with many aspects of Facebook.com, including the News Feed and Notifications. All of the core Facebook Platform technologies, such as Social Plugins , the Graph API and Platform Dialogs are available to Apps on Facebook.
Building an app on Facebook gives you the opportunity to deeply integrate into the core Facebook experience. Your app can integrate with many aspects of Facebook.com, including the News Feed and Notifications. All of the core Facebook Platform technologies, such as Social Plugins , the Graph API and Platform Dialogs are available to Apps on Facebook.

Apps on Facebook.com - Développeurs Facebook

Dialogs provide a simple, consistent interface to provide social functionality to your users. Dialogs do not require any additional permissions because they require user interaction. Dialogs can be used by your application in every context: within a Canvas Page , in a Page Tab , in a website or mobile web app, and within native iOS and native Android applications.

Dialogs Overview - Développeurs Facebook