The Rebel Mail User API allows you to send interactive emails from your application immediately. The emails work in all major clients including; iOS Mail, Apple Mail, Gmail, Yahoo, and Android. Rebel provides a way to make emails interactive while not requiring plug-ins and currently supports SendGrid, Mandrill, SailThru, Mailgun ESPs and more.
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.