• iOS5: Migrating your code to NSJSONSerialization using the Adapter Design Pattern 2011-10-25
• json-framework: This framework implements a strict JSON parser and generator in Objective-C
• yajl-objc: Objective-C bindings for YAJL (Yet Another JSON Library) C library
• Classes for fetching and parsing XML or JSON via HTTP 2011-05 Cocao With Love
• Nextive JSON parser