Preparing for November’s National Novel Writing Month? Get a leg up with A Novel Idea, an app that can help you with setting, characters — basically, everything you need to write that book except the time and motivation. Save chunks of ideas for inspiration, then link them together on a storyboard-like menu that helps you create a story flow. Working with multiple ideas, you can try out various scenes, characters or settings in different plots. It would also be useful for other writing, such as essays. Free, for iPad and iPhone. A $2.99 upgrade to the “pro” version will also let you sync your notes to Dropbox.