Twitter Moments - Follow along with current events
140 - Restrict tweets to 140 characters
Target Your Competitor - Tweet your product to all the followers of your competitor.
Google News - Comprehensive up-to-date news coverage, aggregated from sources all over the world by Google News.
heatmap.js - Dynamic Real-time Heatmaps for the Web
Unfiltered.news - What the world is talking about, visualized graphically