I've bumped into a few myself so wanted to share in case others were interested.
Maybe there are others out there you want to share too. I know the below are available on the iPhone and quite possibly Android, but not sure about any other platforms outside that ...
Volvo Sensus - high level overview with some FAQ on the Sensus system.
Volvo V40 manual - my favorite pastime while was waiting for delivery of the car. Still useful to look up info and instructions quickly.
Volvo On Call - if you have the On Call option on your V40 you can use this to connect with your car, and check a variety of stats and control certain elements of the car.
Volvo V40 - essentially a brochure of the car giving you a nice overview of the cars unique features and design elements.