Popular Libraries

• https://github.com/johnezang/JSONKit - optimized for speed
• https://github.com/stig/json-framework/ - long history and widely used
• https://github.com/TouchCode/TouchJSON - parses NSData instead of NSString

Articles

• http://www.cocoanetics.com/2011/03/json-versus-plist-the-ultimate-showdown/
• http://stackoverflow.com/questions/4993118/json-library-for-iphone-installation
• http://stackoverflow.com/questions/286087/best-json-library-to-use-when-developing-an-iphone-application …

Best Libraries

• FMDB - “A Cocoa / Objective-C wrapper around SQLite” (1st most popular on github). More documentation.
• TouchSQL - “Modern sqlite wrapper” (2nd most popular on github)

Ok Libraries

• GTMSQLite - part of Google Toolbox for Mac
• CoreSQLite 3 - “fast, clean, powerful” (3rd most popular on github). Too close to raw sqlite.

Other …