Some apps that I have checked out and have on my Android Tablet:
WikiCamps Australia
A user generated list of favourite campsites across Australia.
Can provide you with info on campsites including costs/free, toilets, fireplace, dogs allowed, etc.
Also a map of where it is, a user star rating, camp photos.
Oz Road Trip:
A list of nice road trips in Australia with a written report of what you can see, time taken, distances, trip map, internet links, contact numbers etc.
MotoRides:
Motorcyclerides.com
Similar to above, but popular motorcycle rides in Australia.
Ride summary, ride description, Directions, Video, map....
Autoguard:
A blackbox recorder for your car (or bike).
Set your phone/tablet up on your dash to record photos, video or incidents!
Daily Roads Voyager:
Similar to alove.
records gps, spped, etc when event/incident happens.
Glympse:
Allows you to send an email to a friend that has a link to a website that shows a map and your whereabouts on the map as you travel.
Policelink:
Allows you to send non-urgent information to QLD Police.
Provides a link to their website that allows you to dob in no-gooders.
Fare evasion form, Fuel drive off form, Hoon online, lost property, willful damage/graffiti, etc.
AndroidLost:
Allows you to control your phone/tablet if it is lost or stolen. You can get info on it's location, take photos, record sound, disable/wipe the phone, etc.