  Interestingness,as the composition of Relevance and Unexpectedness, has been
tested by means of Web search cases studies and led to promising results. But
for thorough investigation and routine practical application one needs a
flexible and robust tool. This work describes such an Interestingness based
search tool, its software architecture and actual implementation. One of its
flexibility traits is the choice of Interestingness functions: it may work with
Match-Mismatch and Tf-Idf, among other functions. The tool has been
experimentally verified by application to various domains of interest. It has
been validated by comparison of results with those of commercial search engines
and results from differing Interestingness functions.
