Maps: Aside from the addition of Twitter support (see above), iOS's Maps app will now suggest multiple routes when you ask for directions, where applicable. Routes are displayed on the map overlay, along with clear labels—Route 1, Route 2, Route 3, etc. Tapping any route will display the distance and estimated time for that particular option, along with the major roads or routes taken; you can then step through the directions of your selected route as usual.
Weather: Largely unchanged since the iPhone was first released, Apple has finally given Weather a couple of minor improvements. There's the new Local Weather feature, which gives you the forecast based on your current location; when enabled it always appears as the first "card" in the Weather app. Also, you can now get a scrollable hourly forecast for the current day and part of the next by tapping or swiping down on the daily forecasts. Still, the app lacks most of the features of competing third party apps, including such niceties as radar maps.
Stocks: Weather's partner in crime, the Stocks app has gotten only a minor change in iOS 5: the addition of Live Quotes where available. To date, most stock figures on iOS have been delayed by 15 minutes. Now you can watch the economy dip in real time, if you're feeling masochistic.
(Image Caption: Definition of the Term: The dictionary that first appeared in iBooks is now accessible systemwide in iOS 5.)
Dictionary: Since its launch, iBooks has included a built-in dictionary that lets you quickly look up definitions. In iOS 5, Apple has expanded the dictionary systemwide; now pretty much any place you can select text, you can look up a word's definition. Just select a word and tap the Define button that appears. It'll even include information from a biographical dictionary as well.
Custom sounds Ever since the introduction of custom ringtones—heck, maybe even before that—iPhone users have clamored for the ability to set custom sounds for text messages, calendar reminders, and so on. Apple's finally acquiesced: In iOS 5 you can assign custom sounds for texts, voicemails, new mail, sent mail, tweets, calendar alerts, and reminder alerts. And not only can you choose from Apple's included sounds, but you can import your own by dropping them into iTunes, just as you would a custom ringtone.
FaceTime: Now, when you're engaged in a phone call and somebody sends you a FaceTime request—or, when you're involved in a FaceTime call and someone else tries to call or FaceTime you—you'll get a screen that lets you choose to either ignore the incoming call, or to end the current call and switch to the new call. You'll also find a FaceTime button at the top of every conversation in Messages, and Apple claims to have improved FaceTime video quality.