I've been so lucky lately and have been offered a free dress and a free bra!
The free dress is from a website called Pocket Diva who have just started selling petite sized clothes in Australia. I wrote to them about their sizing charts as it looked like even their smallest size garments would be MASSIVELY too big for me. The owner wrote back thanking me for my email and letting me know that she'd re-measured some of the garments and the size charts were off. She then offered to send me a sample dress for free!
The free bra is a Little Bra Company strapless bra. There is one Australian stockist of these bras (www.misa.com.au) and I've had nothing but great experiences with them (lovely service, super fast, free shipping, follow up calls to make sure I'm happy with the sizes). I ordered a strapless bra but there have been delays and issues with getting it in (stock availability issues, not anything to do with this store) and to apologise the owner is sending it to me for free once it comes in.
I am amazed and feel very, very lucky!