"Carrot2 is an Open Source Search Results Clustering Engine. It can automatically organize small collections of documents (search results but not only) into thematic categories."
Want to save or analyse all the tweets which used a particular hashtag? Enter a hashtag below to get a list of all the tweets which referenced it, to download as a CSV spreadsheet or share with friends or colleagues - great for post-event analysis. No logins or spam tweets involved, promise.
I've put together a list of 150+ general web search engines; that is to say, search engines that search the web. It is not a complete listing, nor is it a 'best of'; it's just a collection of engines that I know about and that I've blogged about as well. There's a few specialist ones too! If you know of a general search engine that I've not included, please email me!