Here are a few free mobile apps available in Google Play from Mobile Market:

The Queue Prime mobile queuing system consists of 2 mobile apps: 

Queue Prime for Offices mobile app is used by Offices or Clinics to manage their queues; 

Queue Prime is used by clients and patients to check the current queue of the Office/Clinic they are waiting on, to give them the freedom of their time while awaiting their turn.

WeatherStar is a weather forecast mobile app, that displays the granular weather trend for the next few days.

Prio is for tasks, goals and projects. It enables progress and priority tracking.