Twittectory.com * – directory of twitter services* – we are not associated with Twitter.com

WeFollow
WeFollow is twitter based web service with list of popular tags, top twitter users (by numer of  followers).  You can find special twitters categories by typing your search keyword.
Most popular categories are listed on front page, they show us most popular tweeters by popular categories such as celebrity (Britney Spears and others),  social media,  enterpreneur, [...]