From their site: CKAN is the Comprehensive Knowledge Archive Network, a registry of open knowledge packages and projects. CKAN is the place to search for open knowledge resources as well as register your own. CKAN has a wiki-like interface that lets anyone add and correct packages. Examples of existing entries include a set of Shakespeare's works, a global population density database, the voting records of UK MPs, or 30 years of US patents. Those familiar with freshmeat, CPAN or PyPI can think of CKAN as providing an analogous service for open knowledge. CKAN is developed and maintained by the Open Knowledge Foundation.
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.