Using iDocShelf you can arrange documents in the shelf by downloading them using your dropbox or box.net account.The downloaded books will be available offline and the internet is only required to download the document...
iBookWriter is a simple, flexible, and cost-effective application to write books/notes/draw diagrams etc on your iPad....
AgileBoard resembles to Kanban, Scrum or any combination that involves daily stand-ups
and the use of a whiteboard with stickies for visualizing the tasks at hand...
iWriteBook(iPhone) is a simple, flexible, and cost-effective application to write books/notes/draw diagrams etc on your iPhone.... 
iAgileBoard uses sticky notes on the e-board to organize and keep track of hours spent.
Estimated and Actual Hours per task per Column can be tracked....