I came across this organiser app (2Do) and thought it would be great to replace all those sticky labels I have at work (sticky labels represent my "To Do" list and are forever becoming unstuck and blowing away every time someone opens the door. On top of everything else, they are messy!) What caught my eye was that one user commented that it almost exactly replicated what he would have in his diary.
Some of the features include: tabbed calendars; drag and drop to move a "To Do" from one calendar to the next; email alarms; image attachments so you can add an image to any task; project and check lists and snooze alarms. There are many more - too many to list! Click on this link to see for yourself: