Objectively provides object oriented programming constructs for GNU C, and implements a small but useful core library resembling Apple's Foundation framework. It's primary goals are as follows:

Bring rich object oriented programming semantics to GNU C / C99
Provide convenient solutions to challenges commonly faced in modern application development
Embrace popular modern compilers (GCC and Clang), utilizing extensions thoughtfully

Key Features

Single-parent inheritance through starts-with structure composition
Class and instance methods with strongly typed interfaces
Automatic class loading and lifecycle management
Automatic memory management with reference counting
Unicode and multibyte character set String support
Object primitives for Boole, Date, Null, Number, String
Mutable and immutable collections variants such as Array and MutableDictionary
JSON parsing, marshaling and introspection with JSONSerialization and JSONPath
Low-level concurrency constructs such as Lock, Condition, and Thread
High-level concurrency with Operation and OperationQueue
Resource loading via Internet protocols with URLSession and URLSessionTask

API

Browse the Class hierarchy to grok the API.

Examples

Examples of implementing types, invoking methods, etc.. are covered in the project's README.