SimpleDB/dev runs on Windows, Linux and Mac. The Wareseeker.com page that you found has copied the information across incorrectly. The Google Code project page for the tool is here

http://code.google.com/p/simpledb-dev/

The C# library (http://developer.amazonwebservices.com/connect/entry.jspa?externalID=1133) includes a mock library that sounds like it might do the trick for you. I have not used the mock functionality, but I believe that it uses an XML file as a backing store to hold the simulated domains.

One thing to keep in mind is that a few months ago, Amazon released the AWS SDK for .Net (http://aws.amazon.com/sdkfornet/). I m still using the C# library and have not gotten around to looking into the AWS SDK, so I m not sure if the mock functionality is included or not. Based on this thread, it sounds like the AWS SDK is a rollup of all the various service SDKs (including the SimpleDB C# library), so it may well contain the mock stuff.

I tried http://code.google.com/p/simpledb-dev/ with Typica, but it didn t work because of version mismatch. simpledb-dev seems to support only a 2007 version of the protocol.

I tried release 0.1.10 of simpledb-dev uploaded on Jan 02, 2009, which is the latest to date.

(I wanted to add this note as a comment to Andrew Fogg answer, but I don t have comment privilege).

UPDATE: further details. With Typica 1.7.2 I get the following error:

<Response xmlns="http://sdb.amazonaws.com/doc/2007-11-07/">  
  <Errors> 
    <Error> 
      <Code>NoSuchVersion</Code> 
      <Message>SimpleDB/dev only supports version 2007-11-07 currently</Message> 
      <BoxUsage>0.0000219907</BoxUsage> 
    </Error> 
  </Errors> 
  <RequestID>0827d740-9654-4c6f-bed4-f97d19b40430</RequestID> 
</Response> 

I also tried with the official AWS Java SDK version 1.1.3, but I could not find a way to point to a local server. AmazonSimpleDBClient accepts a ClientConfiguration object in the constructor, but there are no setters for server and port in ClientConfiguration.

Have a look at fakesb: https://github.com/stephenh/fakesdb, a Scala implementation of SimpleDB for local testing. Seems to be better maintained than simpledb-dev (I haven t tried it yet).

Another alternative may be node-mdb, a Node.js implementation: https://github.com/robtweed/node-mdb (latest commit 2 years ago).

Have you considered simply running multiple SimpleDB accounts for dev, test, and production? SimpleDB has a pretty generous free-usage tier so this doesn t cost anything unless you create a very large dev database.

I ve had pretty good results using this approach plus mocking my SimpleDB interactions for unit testing.