ASIHTTPRequest is an easy to use wrapper around the CFNetwork API that makes some of the more tedious aspects of communicating with web servers easier. It is written in Objective-C and works in both Mac OS X and iPhone applications

A Swift 4 framework for streaming remote audio with real-time effects using AVAudioEngine.

Cocos2d-x is a cross-platform C++ port of the Cocos2D library. A suite of open-source, cross-platform, game-development tools used by thousands of developers all over the world.

A Cocoa / Objective-C wrapper around SQLite.

A project that includes a module for drawing arbitrary .ttf fonts for iPhone.

The Google Data APIs (GData) provide a simple protocol for reading and writing data on the web. Each of the following Google services provides a Google data API: Blogger Calendar Calendar Resource Contacts Content API for Shopping Documents List Email Audit Email Settings Google Analytics Google Apps Provisioning Google Webmaster Tools Picasa Web Albums Spreadsheets YouTube

GTM HTTP Fetcher makes it easy for Cocoa applications to perform http operations. The fetcher is implemented as a wrapper on NSURLConnection, so its behavior is asynchronous and uses operating-system settings on iOS and Mac OS X.

Auto-generated Google GTL library for accessing YouTube's new JSON API.

SBJson (aka json-framework) JSON (JavaScript Object Notation) is a light-weight data interchange format that's easy to read and write for humans and computers alike. This library implements strict JSON parsing and generation in Objective-C.

ZBar is an open source software suite for reading bar codes from various sources, such as video streams, image files and raw intensity sensors. It supports many popular symbologies (types of bar codes) including EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Interleaved 2 of 5 and QR Code. The flexible, layered implementation facilitates bar code scanning and decoding for any application: use it stand-alone with the included GUI and command line programs, easily integrate a bar code scanning widget into your Qt, GTK+ or PyGTK GUI application, leverage one of the script or programming interfaces (Python, Perl, C++) ...all the way down to a streamlined C library suitable for embedded use. ZBar is licensed under the GNU LGPL 2.1 to enable development of both open source and commercial projects.