Tweet Topic Explorer [neoformix.com] is a bubble chart illustrating the most popular themes discussed by a specific user-chosen Twitter account.

Technically, the content of the recent tweets is analyzed by a so-called Word Cluster Diagram algorithm, which groups together the most frequently used words in a collection of tweets by their thematic relationship. The resulting graph can then be interactively explored and filtered by selecting individual keywords.

More information is available at Neoformix.