Easy to use CFNetwork wrapper for HTTP requests, Objective-C, Mac OS X and iPhone.

The Audio Toolbox framework provides interfaces for recording, playback, and stream parsing. In iOS, the framework provides additional interfaces for managing audio sessions.

The AV Foundation framework provides an Objective-C interface for managing and playing audio-visual media in iOS and OS X applications.

Core Foundation is a framework that provides fundamental software services useful to application services, application environments, and to applications themselves. Core Foundation also provides abstractions for common data types, facilitates internationalization with Unicode string storage, and offers a suite of utilities such as plug-in support, XML property lists, URL resource access, and preferences.

The Core Graphics framework is based on the Quartz advanced drawing engine. It provides low-level, lightweight 2D rendering with unmatched output fidelity. You use this framework to handle path-based drawing, transformations, color management, offscreen rendering, patterns, gradients and shadings, image data management, image creation, and image masking, as well as PDF document creation, display, and parsing.

Fast Caching for Objective-C (iPhone & Mac Compatible).

What if images on the iPhone were as easy as HTML?

A Cocoa / Objective-C wrapper around SQLite.

The Image I/O programming interface framework allows applications to read and write most image file formats. This framework offers high efficiency, color management, and access to image metadata.