MarketWatch's Cody Willard has put together a number of top-5 lists for iPhone and iPad apps. Check it out if you want to see what he feels are the 5 best iPhone apps for email, humor, getting things done, stock market quotes, and making music. And he offers up the top 5 iPad apps for Wikipedia, business travelers, reading, and toddlers. His list of the funniest apps includes iLaugh, with over 50,000 jokes. It features a new joke each time you open the app. The Lite version is free, and the paid version ($2.99) doesn't have ads.