Antonio Gulli has two interesting tools up on the web. The first is a Rank Comparison Engine, which will query a bunch of search engines, get their list of hits and build a table of points (pills) showing which hits are unique to which index and which shared. The results are interactive, allowing you to mouse-over points to see the short description.
The second is SnakeT Clustering Engine (SNippet Aggregation for Knowledge ExTraction.) It searches various indexes and builds a list of high frequency words that cluster with the query word. You can then navigate by the cooccuring words. Neat use of text analysis for concept exploration.
My one complaint is the design – he needs a graphic designer to make these sing.
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