Readability, from Arc90, removes the clutter from busy Web pages, making them much easier to read. On the Readability website, set your preferences for how you’d like to view web pages – font size, margin and page style. Then add the customized bookmarklet to your browser’s toolbar. When you come upon a cluttered page, click the bookmarklet and get a nicely cleaned up page, ready to read or print. (via Tech Chicks Tips)
TBuzz, also from Arc90, helps you quickly post a note about a web page to Twitter, while showing other Twitter comments about that page.
I’m curious to check out their other projects on their labs page.