OmniGroup Frameworks: Objective-C frameworks for Mac OSX and iOS apps

The Omni Group, makers of wildly popular Mac and iOS products such as OmniFocus and OmniGraffle, want to share some of their code with you.

The OmniGroup Frameworks are a set of Objective-C code libraries for both Mac and iOS that peform a wide range of common tasks.

OmniFoundation includes a set of low-level objects like OFStringScanner for scanning Unicode strings, OFRegularExpression for Regex, and OFMessageQueue & OFQueueProcessor for multithreaded operations.
OmniDataObjects resemble CoreData light, built on top of SQLite for Mac and iOS.
OmniAppKit provides types like OAOSAScript for enabling AppleScript in your app, OAPreferences for multi-pane preferences windows, and OAFindPanel for find-and-replace tasks.
OmniInspector is the inspector seen at work in OmniGraffle, OmniFocus, OmniOutliner and OmniPlan
OmniNetworking provides higher-level types to work with TCP, UDP and Multicast networking.