S3Emulator is a lightweight server which mimics the services of Amazon S3. It can be useful for development and testing porpuses. By reducing network traffic, it saves both the time and the money.

• GET Service
• PUT Bucket
• DELETE Bucket
• HEAD Bucket
• GET Bucket(List Objects)
• PUT Object
• GET Object
• DELETE Object

Download the application from here. Open a command promt window and just enter : "S3Emulator"
When started with default options, all the requests made to "s3.amazonaws.com" will be redirected to S3Emulator.
You can see the full list of options by entering : "S3Emulator -help"

• Service
  Address of s3 service that will be emulated.
  Default: s3.amazonaws.com

• Proxy
  Proxy is used for supporting secure connections and subdomain style bucket names.
  If you disable proxy, you need to use http protocol and request-uri syle bucket names.
  FiddlerCore is used for proxy support.
  Default: true

• ProxyPort
  The port to use for the proxy.
  Default: 8877

• HostPort
  The port to use for the S3Emulator's http listener.
  Default: 8878

• Directory
  The directory for the storage operations.
  RavenDB is used for persistance.
  Default: ~\Data

• InMemory
  If set to true, all storage operations will be in memory.
  Default: false

• MaxBPS
  Set maximum bytes per second. Can be used for bandwidth throttling.
  Default: infinite