This Kvpbase Objective-C SDK connects an application with a RESTful object storage platform. This platform is intended for developers and sysadmins. API Keys should be retrieved dynamically from your servers.
Google has open sourced its Cloud Search Connector SDK. The goal is to ease the search of third-party content and identities within a company. Google originally partnered with around 50 partners around the world to build third-party connectivity for Cloud Search and has now opened up a public SDK.