Poyozo is a nice Firefox add-on which aggregates one’s internet life and activities and allows reflective overview of one’s web presence. It aggregates keywords from various sources like email, RSS, blogs, web browser’s history, social web sites, calendars, etc. Keywords are then presented on a calendar as tags where the size of each tag depicts the number of occurrences. The interface is divided in several tabs to separate different aspects of internet activities.
The only thing is that it is not UTF friendly :(.