From their site: CellTrust mobile solutions and technologies can be used in a wide range of applications, from enterprise applications, content management systems or to add mobile as a channel to an existing website regardless of the technology you are currently using. Our SMTP API makes it possible to integrate an application by using email. Simply send an email to us and we convert it to SMS.
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.