Carrot2

If you're looking for an Open Source Search Results Clustering Engine, you should consider Carrot2. By using this software, you will be able to efficiently organize small collections of documents, such as search results, into thematic categories automatically.

One thing that sets Carrot2 apart from similar software is that it offers two specialized document clustering algorithms, as well as a variety of ready-to-use components for fetching search results from various sources, including YahooAPI, GoogleAPI, MSN Live API, eTools Meta Search, Lucene, SOLR, Google Desktop, and more.

Moreover, if you're worried about the implementation of Carrot2 in your system, be assured that the software is implemented in Java. However, you can still easily integrate it with non-Java software, such as Ruby, PHP, or C#. The downloads page can assist you with choosing the right package for you.

To sum up, Carrot2 is an excellent software option for those in need of a tool to efficiently cluster their search results. With its advanced algorithms, flexible integration with non-Java software, and variety of ready-to-use components, it's worth considering for your needs.