Did y'all know the HTC One can do these things:
If you scroll with 2 fingers in contacts, gallery, music, and many other apps, it scrolls much faster (using it in the contacts list goes through the alphabet, using it in the text converstaion list goes through dates of conversations)
You can pinch zoom text-messages
Double tap your Bluetooth button with camera active to remotely take a snap
In camera, from the top swipe down and it'll switch from back to front camera and viceversa (I love this one. I always thought it was stupid to have to flip the camera through the menu)
Tapping on the statusbar while in the app drawer or blinkfeed, music, people, and message app brings you straight up
You don't have to pull up the lock or the time on the lock screen - swipe up anywhere to unlock your phone. Same goes for answering a call
You can increase the volume on your tv via the volume rocker on your phone instead of the on screen buttons
You can adjust the brightness of the torch/flashlight with the volume rocker
Holding the back button in the browser brings you to history
If you have the camera app open and turn off the phone, the lockscreen will be inactive, meaning when you press the power button again you go straight back to the camera app, no need to unlock
Select "Show Magnifier" in the Accessibility menu and you get a magnifying lens that pops up when you are editing text
You can swipe right to left to skip the track it left to right to go to the previous track. There's a cool sliding in/out animation too.
The coolest feature though, is that you don't have to press back to get back to your library or playlist. You can swipe down from the songbtitle and your library of songs is waiting behind it.
In the Stock Browser go to Menu>Settings>Labs to switch on "Quick Controls". Slide thumb from left or right edge to open quick controls and hide app and URL bars.
Also swipe across the keyboard to easily switch to the numbers and symbols pages!
You can access HTC's hidden Self diagnostic tool by following steps:
Go to dialer,
Dial *#*#3424#*#*
You will enter HTC's self diagnostic tool
You can check if all the parts and sensors on your device is working.
If you're watching tv and have the tv remote enabled and you're getting a call it automatically mutes the tv.
The ones I highlighted should interest those that miss these features from iOS (though tap to go back to the top isn't universal).