M/DB is a plug-compatible alternative to the Amazon SimpleDB. Outwardly, it behaves identically to SimpleDB, being accessed through the same REST APIs and returning identical responses. The only difference in use is that REST requests are directed at a different domain name or IP address.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.