EC2 Price Reduction (C4, M4, and T2 Instances)
aws.amazon.com
aws.amazon.com
One thing I really wish they did however, is adopt Google's "Continuous Usage" billing. There's just too much mental overhead, uncertainty and risk with buying and reselling reserved instances. I end up losing hundreds of dollars a year in potential savings on AWS because I have a bad habbit of shying away from fully reserving my usage.
And then when I do, I always seem to get bitten. Case in point: a few weeks ago I reserved 1 year of heavy usage for a m4.xlarge. Looks like I could've saved 10% had I waited a few weeks.
That said, I do prefer the AWS ecosystem a lot more than Googles, but billing is something Google does _much_ better and that is something that is something that is really tempting me to switch.