From their site: The idea is simple: to make a democratic search engine, in which the order of the results are democratically elected by the users. By voting in the results, thus giving us feedback about the ones you like and don't like, we can maintain a better listing and get rid of those spam-filled, illegal, and poor quality websites.
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.