Cell Towers Viewer for Canberra

Shows all registered Telstra/Optus/Vodafone/Three mobile phone antennas within 5km of an address (the maximum effective range for 3G). Can get very few results for some addresses - but I'm sure it's reflecting the recorded locations of all towers registered with ACMA.
Try a couple of addresses/suburbs around the same area to see how the layout/network differences change.
Unfortunately it has to limit to addresses in Canberra to get good search results - do you know how many George Streets there are in Australia? And it can't just be a free roaming slippy map because you have to pay $1k+ for the whole list at once. Complain to your politicians about paying for things your taxes already paid for :P
Can be quite slow in some areas like shopping districts because it has to filter out all the other radio transmitters for security companies etc. You'll know it's loaded because at the very least a house icon will appear in the center of the screen.