Trendrr - Track, Compare and Share Data Free
http://www.trendrr.com/

Track, compare and share data, free. Identify trends across social graphs and networks, realize the potential of p2p, track engagement metrics, look at what is really happening, real time. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been added to Business Intelligence Resources Subject Tracer™ Information Blog.