Paper.li is a Twitter tool which creates an everyday "newspaper" with the tweets of the people you follow. After you sign in with your Twitter account, you can either choose between many issues and interests to read from Twitter or create your own newspaper. In your newspaper you can include twitter users, hash tags (#) or lists (@) you want to keep up with. You can create multiple newspapers and also, you can have paper.li notify you by e-mail when a newspaper is released.
Spindex
Spindex is an experimental product released by Microsoft FUSE Labs. You can use it to search throughout social networks and microblogging services such as Facebook or Twitter. It shows you recent activity in your prefered social networks and in addition with Spindex you can search content in social networks or the web and (re)share it. After you log on with your Windows Live ID you need to make an invitation request, cause it's an experimental project. For me it took around three days to receive my invitation. The whole site is based on Microsoft Silverlight.
TweetDeck
TweetDeck is a Windows application based on Adobe AIR. It has a wonderful interface and it's very easy to use. After the installation, you sign in on your favourite services such as Twitter, Facebook or LinkedIn and you have real time notifications of new posts, tweets and other stuff! Also, you can search with hash tags (#), users or lists (@) on which you take real time notifications, too. The whole interface is organized on columns according to your search, users, social network and others. One significant drawback is that when you have signed in on multiple networks, you may get frustrated by the mass of notifications, also due to many posts, it would not be easy for you to keep up with all of your news.
Spindex
Spindex is an experimental product released by Microsoft FUSE Labs. You can use it to search throughout social networks and microblogging services such as Facebook or Twitter. It shows you recent activity in your prefered social networks and in addition with Spindex you can search content in social networks or the web and (re)share it. After you log on with your Windows Live ID you need to make an invitation request, cause it's an experimental project. For me it took around three days to receive my invitation. The whole site is based on Microsoft Silverlight.TweetDeck
TweetDeck is a Windows application based on Adobe AIR. It has a wonderful interface and it's very easy to use. After the installation, you sign in on your favourite services such as Twitter, Facebook or LinkedIn and you have real time notifications of new posts, tweets and other stuff! Also, you can search with hash tags (#), users or lists (@) on which you take real time notifications, too. The whole interface is organized on columns according to your search, users, social network and others. One significant drawback is that when you have signed in on multiple networks, you may get frustrated by the mass of notifications, also due to many posts, it would not be easy for you to keep up with all of your news. 
