Schedulr is a JSON web service which can invoke a URL at a scheduled time. In that callback implementation, users can either put the logic to complete the task online or if it's a time consuming one, users can queue it up so that background consumers can finish it.
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.