Tracking down the cheapest source of petrol is a common activity for budget-minded Aussies. Carsguide has launched a mobile-friendly petrol price tracker which shows the cost of various fuel types in your area.
The site will identify your location via GPS, or you can enter a postcode, and specify the kind of fuel you want to find (unleaded, diesel and premium). The results are shown either in list form or on a map, and you can sort results by price or distance from your current location. Sounds potentially handy if you're out and realise you need a top-up; it's also a useful reminder that a general-purpose mobile site can be just as useful as an app for a specific platform.