Meeting Ticker -- if this helps shorten even one meeting by one minute, it'll have been worth it.
I Hardly Know Her - is an "alternative way to view Flickr photostreams. It is designed to facilitate high quality viewing with minimal distractions." By Justin Ouellette, creator of Muxtape.
page2rss is a simple, effective RSS scraper. For instance, here's an RSS feed for Astronomy Picture of the Day. A powerful feature: "You can add a button to your browser's bookmarks toolbar that will create Page2RSS feed for the page you are currently viewing."
Don't know which candidate to support in the 2008 election? Let a web script match a candidate to your views!
"I’m going to draw a chart for her with lines and arrows". Diagramming web apps: ajaxSketch, bubbl.us, flowchart.com, mindmeister, gliffy and mindomo.