From their site: the Jaduka API gives developers direct access to, and all the inherent benefits of, the world's highest-quality, ubiquitous public switched telephone network (PSTN). Based on common Web standards, the API facilitates quick and easy development of virtually limitless voice-enabled business applications that can be used with any existing telephone -- wired, VoIP or wireless.
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.