From their site: Tucows Feedcache is Quality of Service for RSS. It is designed to make syndication formats more available and more predictable for developers. Tucows Feedcache: Developer Edition provides a web services interface to a user-populated cache of RSS feeds that developers can use and implement in their applications. Tucows initially developed Feedcache for internal use only, but really didn't see any good reason why such an excellent service should be kept under wraps.
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.