I recently contributed to a carefully curated list of "51 apps that entrepreneurs can't live without". The premise was to go beyond the obvious choices like Evernote and Dropbox. This resulted is a rather thorough look at the way small business owners are operating from all over the world. My recommendation was "Awesome Note" which I use heavily for writing and organizational purposes on the iPad.
You can check out the full list of apps here.
This list was assembled by Secret Entourage, which is about "understanding that anyone that believes in true Entrepreneurship can have a voice regardless of their age, social status or the amount of money they have made. Anyone can have a great idea, and everyone can be a driver for change or be a leader rather than a follower, anyone with the desire to succeed should have the help and support of those around them, so that they in turn can one day help others do the same.”