PeerIndex!

Klout is the standard for influence. Look up your Klout Report to find your influence level, user style, and content. We believe that every individual who creates content has influence. Our goal is to accurately measure that influence and provide context around who a person influences and the specific topics they are most influential on.

Bluenod is a simple way to visualize Twitter communities and find influencers.

Kred, measures influence within online communities connected by interest.

GroupHigh is outreach marketing software that helps recruit, communicate, and manage relationships with influencers, advocates, and bloggers.