This service restores dialogues from Twitter. Just post here an URL (or simply status ID) for any public status (posting in Twitter), published in reply to some user and see the whole conversation.
Cadmus is a real-time service that manages your stream (Twitter, FriendFeed and RSS) by displaying the most relevant content since the last time you checked in. It helps you get caught up on what you have missed.
With TweetAlert you can follow your favorite search string in Twitter. Everytime your search string (with a #hash-tag) is twittered, this tweet will be re-twittered by this service via your own Twitter account.
Ping.fm is a simple service that makes updating your social networks a snap. we support over 30 social networking sites and we're adding more regularly.
AirTalkr is a multi-protocol Instant Messenger that connects to MSN, Yahoo!, GTalk, AOL and ICQ. Not only that, it also has connects to to various Web 2.0 services like Flickr and YouTube. AirTalkr runs on Adobe AIR, so you will need the runtime to use it. As of now, AirTalkr can run on Windows and Mac. Also has Web version
OneRiot crawls the links people share on Twitter, Digg and other social sharing services, then indexes the content on those pages in seconds. The end result is a search experience that allows users to find the freshest, most socially-relevant content from across the realtime web.
Brizzly is a reader for Twitter and Facebook (more to come). It simplifies your browsing and updating experience, while adding a few nifty extras.
*See videos and pictures*Brizzly shows videos from YouTube and Vimeo, and pictures from Brizzly, Twitpic, Flickr, and others immediately so you don't have to click away to another page.
*Never get Rickrolled again*Brizzly expands shortened URLs from bit.ly, tinyurl.com and other common short URL services. This way, you can see where you're going before you go there.
*Muting*Hide a user's updates from your main timeline without having to unfollow them. This is especially useful if you don't want to see someone's updates for a brief period without causing the social shame of actually unfollowing them. You can always un-mute from your settings page.
*Share links easily*Want to share a link to the page you're on? Open the Brizzly extension and we'll populate the search box with the URL of your current tab.
LazySharer is a bookmarklet tool that helps you quickly share links with your friends on Twitter, Facebook and Delicious. The main focus is that you can share links quicker to the right services and it also suggests tags which you can use to later find your content or just to discover new connections.
a site where the top 100 bloggers' tweets are featured and analyzed. The service allows users to view the links most tweeted as well as displays Technorati's original concept of showcasing the Internet's top trafficked blogs and content from its contributors. One interesting component of the site is the fact that users can view the pictures shared by today's Twitter and blogging elite.