It's Friday, meaning it's time for the best iPad apps of the week. This week, we're wowing you with a navigational app for boaters, one that will teach you something, and another that will test your knowledge of pop culture. IBM Think: How did we get from the invention of the wheel to the personal computer? It's been a long road, marked by very important developments along the way. Based on IBM's Think exhibit staged in NYC last year, this app maps innovation in a beautifully-designed package. Free...
