Social CRM / Address BookGist http://gist.com/Nimble http://www.nimble.com/Xeesm http://xeesm.comAddressBookOne http://www.addressbookone.com/Hashable http://hashable.com/

People FinderRapportive http://rapportive.com/Querly http://www.qwerly.com/PeekYou http://www.peekyou.com/

Analytics / MetricsTwitalyzer http://www.twitalyzer.com/PeerIndex http://www.peerindex.net/KloutTwentyFeet https://www.twentyfeet.com/HootSuiteBit.lyHelloBar http://hellobar.com/Export.ly http://export.ly/Friendorfollow http://friendorfollow.com/

Twitter ToolsTwittercounter http://www.twilert.com/Twilert http://www.twilert.com/Tweasier http://tweasier.com/Twitblock http://twitblock.org/Tweetgrid http://www.tweetgrid.comFormulists http://formulists.com/Tweetcloud http://tweetcloud.com/

Other monitoring toolsShoutlet http://www.shoutlet.com/Research.ly http://www.research.ly/Radian6 http://www.radian6.com/Sysomos http://www.sysomos.com/