Message Timestamps
Slide text messages to the left to see the messages timestamp in Message app
Closing Multiple Apps
Double click the home button, then swipe up to three apps at the same time by using three fingers and dragging them upwards to close multiple apps at once
Block Calls & Messages
Visit Settings > Phone > Blocked
Add numbers you want to block
Fingerprint (iPhone 5S only)
Settings > General > Passcode & Fingerprint
If you want to know which fingers you’ve scanned, simply touch one of your fingers to the Home button, one of the rows will turn grey for a second
Burst Mode
Press and hold the shutter button in Camera will take a rapid-fire series of shots
Slow Motion Video (iPhone 5S only)
iPhone 5S lets you take slow motion video. You may also take a photo when you are taking a slow motion video
.com
Simply press and hold the "." key and a .com, .net selections will pops up
Swipe
iOS enabled the ability to swipe forward and backwards in many applications, such as Settings, Message, Mail
Bold Text or Change Font Size
Settings > General > Accessibility > and enable Bold Text.
Settings > General > Text Size
Changing the system wide font size
Reduce Motion
Settings > General > Accessibility, Set Reduce Motion to on
Parallax in iOS 7 makes everything look a little bit 3D with moving wallpaper
but you have the option to turn Parallax and animated motion off
Zoom Into Album Art
In Music app landscape mode, zoom in or out your music album art by simply using pinch gestures
FaceTime Audio
iOS 7 adds the ability to have audio only calls using FaceTime