Twitter Search Tools:
See what's happening on Twitter - right now
Search Snap Bird Tweet archive
Twittoratti tracks tweets of highest authority blogs
Trendsmap maps real time Twitter trends across the globe
BackTweets search for links on Twitter
Google Search Tools:
Google Trends - current search trends
The Google Public Data Explorer makes large data sets easy to explore, visualize and communicate.
Google Flu Trends uses aggregated Google search data to estimate flu activity.
Google Alerts are email updates of the latest relevant Google results (web, news, etc.) based on your choice of query or topic.
Other Real Time Search Tools
Whos Talkin? Search for conversations occurring on social media
YouTube Trends Dashboard
Popurls This is the site to go to if you want a full overview of what is happening in the Internet and social web today
SocialMention real time social media search that quantifies your results by sentiment, strength, passion & reach
Boardreader searches across forums and other sites
BuzzFeed Aggregated social trending content
Social Data Sites