[VIC, NSW, ACT] $1 Joining Fee (Normally $25) + 1 Day of Free Driving (Normally $80) @ Popcar
Popcar is a car sharing service with a decent amount of locations in VIC, ACT & NSW. First posted here in 2016, they are running this new promo which basically gets you to try a car for the day for $1. Probably a good time for those going away for a break.
To be eligible, all you need is a valid driver's license, P2 or higher and a valid Visa or Mastercard.
No other charges as long as you keep in under 100kms and don't trash the car. No exit fees or anything else that I can see.
EDIT: Not QLD.