Dual screen but you can take off second display and use it as phone
#LG

Selfie cam flash
#huawei

Ultrasonic pressure sensing virtual buttons
#Asus

3840x2160 RGB panel
#Sony

360 camera attachment
#essential

hifi 3.5mm jack attachment
#essential

Upcoming tracks in media player notifications
#Lineageos

Linux desktop mode inside of android rom
#maru

"Dynamic Perspective": using four front-facing cameras and the gyroscope to track the user's movements, the OS adjusts the UI so it gives the impression of depth and 3D.
#amazon

Alert Slider
#OnePlus

Widgets overview
Pinch to see all widgets from your homescreen. After selecting widget it moves you to exact card with that widget
#Sony

Timescape
#Sony

RGB home button
#LG

Download Booster
#Samsung

Smart screen and Smart scroll
#Samsung

Dual earpiece
#HTC

Mass storage
#AOSP

Power off alarm
#Qualcomm

Kuckle Sense
#Huawei

Press harder to zoom closer
#Huawei

Guess the weight
#Huawei