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.
The Flattr Android SDK by Richard Körber (AKA flattr4j) allows developers to integrate the Flattr API into their Android applications. Since Flattr is changing its API, some of flattr4j's calls are currently failing.