Organized is a new widget from iSlayer featuring a calendar with events, world clocks, notes and to do's. The calendar and to do's utilise OS X's inbuilt databases, so they're always in sync with iCal and Mail.
Awesome, their widgets (or if you want them in your menu bar, their menulings) have always been on my system and I'm glad they released this widget. I like how this not only replaced their menuling for time (since it doesn't fit on my 12" Powerbook) but also grabs iCal events, to dos and Mail notes.
Don't forget to donate to iSlayer.
