Wow this is sweet. It does just what it says on the tin: facilitate you setting up a fake, local S3 service for testing. S3 is awesome, but testing for S3 can lead to some higher than normal bills you weren’t expecting, especially if you’re dealing with large transfers. While you won’t experience the network latency you can at least offload a bunch of development time to Fake S3 while you’re working. Looks neat.