RankSpeed is a search tool that does a sentiment analysis
on the blogosphere / twittersphere to find the
best websites, the most useful web apps, the most secure web
services, etc...
You can search for any website category using tags and
rank by any criteria: good, useful, easy, secure, etc...
For each result a statistical analysis computes the percentage
of bloggers who have said it is good, easy, ...
For example, a website is ranked as more useful than an other
if its name is more often associated with "useful",
"helpful" or other synonyms in blog posts and tweets.
RankSpeed tracks 3 millions of websites, selects
the most commented in the blogosphere / twittersphere and ranks
them by your own criteria.