SocialRank - Graph search for TWTR. Filter by interests, location, etc
Buzzstream - Build Relationships. Build Buzz. Web-based software that helps the world’s best marketers promote their products, services and content.
Flock - A faster way for your team to communicate
FameBit - Easiest Way to Find, Hire, and Work with YouTube Influencers
Accountanalysis - A tool to evaluate Twitter accounts
Meltwater - Media monitoring, social media monitoring & media Intelligence products & tools help companies grow and build brands by listening, understanding, engaging and benchmarking their customers, markets and social business communities.