Twitscoop: Twitter-based term cloud
The success of tag clouds has emerged on the use of clouds for diverse purposes, not only including tags. Twitscoop is an interesting tool, where recent activity on Twitter is empashized by means of a cloud, composed by terms. So, we can name it a term cloud rather than a tag cloud, since it does not include tags.
Twitscoop allows to discover what is being published (or twitted) right now on Twitter and, moreover, it is updated constantly. On the other hand, it shows a list of common terms for the last hours, showing the hot trends on Twitter.