Flock Browser
About: Flock was a web browser that specialized in providing social networking and Web 2.0 facilities built into its user interface.
Support for Flock was discontinued in April 2011. A year later in April 2012 the old Flock website was back and carried a vague indication that the project might be resurrected, inviting readers to add themselves to a mailing list to receive future news.
Features:
Flock 2.5 integrated social networking and media services including MySpace, Facebook, YouTube, Twitter, Flickr, Blogger, Gmail, Yahoo! Mail, etc.
Native sharing of text, links, photos and videos
A "Media Bar" showing preview of online videos and photos as well as subscription to photo and video feeds
A feed reader supporting Atom, RSS, and Media RSS feeds
A blog editor and reader, allowing direct posting into any designated blog
A Webkit-mail component allowing users to check supported web-based email off site, compose new messages, and drag-and-drop pictures and videos from the "Media Bar" or webclipboard into a new email message
Support for third-party add-ons, including a number of Firefox extensions
