Grafitter
Grafitter is a way of collecting information about yourself over time while sending updates with Twitter, using IM, saving bookmarks on Delicious, and writing a post on Blogger. Grafitter visualizes the information you record in graphs. If you want to record specific information (e.g., your mood, what you ate, the miles you run), use the Grafitter format. The format builds on the Twitter hashtags and looks like this #hashtag(value). Grafitter will automatically download your collected data and visualize it on the screen.