I'm surprised at how many people don't seem to have heard of this site (Vipon.com). It's a great concept - Amazon sellers will send you free or discounted products. That's really all there is to it, I know it sounds like there should be a catch but there isn't. A bit of background...

The site used to be called Amzreviews, and you used to get either free or discounted stuff in exchange for leaving them a review on Amazon afterwards. Then Amazon changed their rules so you're not allowed to accept free stuff in exchange for a review, so the site changed its name to Vipon and changed their rules so that there basically are no rules and you don't even have to leave a review - although you can if you want to, and obviously the sellers hope that you will.

Signing up is really quick, you don't have to give any details other than your email address. Then you just select your country's Amazon site from the drop-down box, and if you want the free stuff just sort by 'Price (Lowest First)', and then click refresh. Voila, all of the free stuff will be listed first. You then just click 'Request Deal' on the ones you want to receive. If you're approved (approval rate I find is about 50/50) the seller will provide you with a voucher code to enter at the checkout on Amazon, which will reduce the price to 0.

I've had about 50 free items from them so far. There's a fair bit of crap on there, but also some good stuff - I've had a couple of bluetooth speakers, bluetooth headphones and stuff like that completely free of charge.

Obviously this works best if you have Amazon Prime as then you definitely won't have to worry about any postage fees.