If you’re into Getting Things Done, live and die by lists, or you want to keep notes or a journal, then Zim could be just what you need. Free and open source, Zim is a lightweight multimedia "desktop personal wiki" that does a whole lot more than just handle text and images. Through plug-ins Zim can check your spelling, perform calculations and create calendars. You can use Zim to create HTML for online publishing and there’s an embedded web server to publish live content. Simple, elegant and thoroughly useful.