QuickPic my favourite and probably the best image viewer for Android has been updated to v2.0. The new version brings a whole new UI. The UI has been changed to match and blend with Android 4.0 Ice Cream Sandwich. It's great to see developers now adopting the new version of Android in a good way and designing their apps around it. There is not much else to the update except for some bug fixes.
If you have an Android phone I highly recommend using QuickPic. It beat any other gallery app, even the 3D one which comes with Android. Also, it's completely free.