Google Spreadsheet

Having experience with Excel, there really wasn't much that surprised me with Google Spreadsheet. In fact, the transfer of skills between the two is what I appreciated most. I'd have to say the most outstanding feature I learned of was how you could directly import an Excel document into Google Docs and it translates into a Spreadsheet. Overall, I really like working with Excel/Spreadhseet. I like working with numbers, and the "Only Once" rule makes filling in tables a breeze.