The Objective-C Foundation Classes is an Objective-C
library. It contains general purpose classes for easier
development of applications, in areas such as data types,
collections, network, C library wrappers, and compound
classes.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.