Here are a couple of my favorites.
ultimatefaves - Not a true Widget, more like a semi-widget. But "UltimateFaves lets you organize your most frequently used items (apps, bookmarks, contact cards, phone numbers, etc.) in beautiful 3D carousels".
sportstap - The widget for this app is awesome. Easily switch between your favorite sports teams, and scroll through previous & upcoming games. And a single tap on the score will bring up the app with scoreboard, game stats & more.