The Airbrake iOS/Mac OS Notifier is designed to give developers instant notification of problems that occur in their apps. With just a few lines of code and a few extra files in your project, your app will automatically phone home whenever a crash or exception is encountered. These reports go straight to Airbrake where you can see information like backtrace, device type, app version, and more.

A similar control to the pull down to refresh control created by atebits in Tweetie 2.

A Cocoa / Objective-C wrapper around SQLite.

A replacement for Cocoa's NSXML cluster of classes. Based on libxml

A delightful iOS statistics and push notifications framework. Malcom SDK help you discover how and where people are using your app. You can quickly identify your most engaged and valuable users and offer them more value in your app.

MGTwitterEngine is an Objective-C/Cocoa class which makes it easy to add Twitter integration to your own Cocoa apps.

OAuth is an open standard for access delegation, commonly used as a way for Internet users to grant websites or applications access to their information on other websites but without giving them the passwords.

TouchJSON is an Objective-C based parser and generator for JSON encoded data. TouchJSON compiles for Mac OS X and iOS devices (currently iPhone, iPad and iPod Touch).

OAuth allows an authorized Twitter developer app to access private account information or perform a Twitter action on behalf of a Twitter account.

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.