Objective-C Framework

Twitter

• pyro2927/Tweeter - GitHub
• mattgemmell/MGTwitterEngine - GitHub

JSON

• SBJson
• gabriel/yajl-objc - GitHub
• johnezang/JSONKit - GitHub
• TouchCode/TouchJSON - GitHub

YAML

• mirek/YAML.framework - GitHub
• patrickt/yamlkit - GitHub

OAuth

• gtm-oauth - Google Toolbox for Mac - OAuth Controllers - Google Project Hosting
• jdg/oauthconsumer - GitHub

HTTP

• pokeb/asi-http-request - GitHub
• gtm-http-fetcher - Google Toolbox for Mac - HTTP Fetcher - Google Project Hosting
• RestKit/RestKit - GitHub

Mail

• Index of /m/MailCore

XML-RPC

• eczarny/xmlrpc - GitHub

Regexp

• RegexKit Framework
• CocoaOniguruma

Image

• yusukeSekikawa/ImageProcessing.framework at master - GitHub
• mattrajca/SVGKit - GitHub

Graph

• SM2DGraphView Framework Site
• core-plot - Cocoa plotting framework for Mac OS X and iOS - Google Project Hosting
• Chad Weider » GraphX Framework

UI

• twitter/twui - GitHub

unfiled

• ParseKit - Cocoa Objective-C Framework for parsing, tokenizing and language processing
• Frameworks at master from omnigroup/OmniGroup - GitHub
• Barcode scanner
• libgit2/objective-git - GitHub