If you want your BlackBerry to keep you organized then Lazy Lists is a must have app!
There are a bunch of organization apps for BlackBerry 10 but Lazy Lists is a real beauty. With so many options - such as different colors for each list you create, it's really customizable. With gestures built in, as well as the ability to share via your BlackBerry Hub, Lazy Lists really hits the spot.
It does its job, looks great and is super user friendly. What more could you wish for.