扫描wifi信息：
http://code.google.com/p/uwecaugmentedrealityproject/
http://code.google.com/p/iphone-wireless/
条形码扫描：
http://zbar.sourceforge.net/iphone/sdkdoc/install.html
tcp/ip的通讯协议：
http://code.google.com/p/cocoaasyncsocket/
voip/sip：
http://code.google.com/p/siphon/
http://code.google.com/p/asterisk-voicemail-for-iphone/
http://code.google.com/p/voiphone/
three20
https://github.com/facebook/three20
google gdata
http://code.google.com/p/gdata-objectivec-client/
720全景显示panoramagl
http://code.google.com/p/panoramagl/
jabber client
http://code.google.com/p/ichabber/
PLBlocks
http://code.google.com/p/plblocks/
image processing
http://code.google.com/p/simple-iphone-image-processing/
json编码解码:
http://code.google.com/p/json-framework
base64编码解码:
http://code.google.com/p/google-toolbox-for-mac/source/browse/trunk/Foundation/?r=87
xml解析:
https://github.com/schwa/TouchXML
安全保存用户密码到keychain中:
https://github.com/ldandersen/scifihifi-iphone
加载等待特效框架(private api):
https://github.com/jdg/MBProgressHUD
http等相关协议封装:
http://allseeing-i.com/ASIHTTPRequest
下拉刷新代码:
https://github.com/enormego/EGOTableViewPullRefresh
异步加载图片并缓存代码:
http://www.markj.net/iphone-asynchronous-table-image/
iphone TTS:
https://bitbucket.org/sfoster/iphone-tts
iphone cook book 源码:
https://github.com/erica/iphone-3.0-cookbook-
iphone正则表达式:
http://regexkit.sourceforge.net/RegexKitLite/
OAuth认证:
http://code.google.com/p/oauth/
http://code.google.com/p/oauthconsumer/
蓝牙协议栈:
http://code.google.com/p/btstack/
语音识别:
http://www.politepix.com/openears/
ShareKit:
http://www.getsharekit.com/install/
日历控件:
http://code.google.com/p/iphonecal/
https://github.com/klazuka/Kal
开源项目汇总（一）
http://www.cocoachina.com/applenews/devnews/2013/0521/6250.html
开源项目汇总（二）
http://www.cocoachina.com/applenews/devnews/2013/0524/6273.html
iOS常用第三方类库
http://www.cocoachina.com/applenews/devnews/2013/0106/5478.html?1359361338
10个有用的第三方iOS开源库
http://www.cocoachina.com/applenews/devnews/2013/0114/5537.html?1359361319
10大iOS开发者最喜爱的类库
http://www.cocoachina.com/applenews/devnews/2012/1108/5050.html?1359360737
iOS高效开发必备的10款Objective-C类库
http://www.cocoachina.com/iphonedev/toolthain/2012/0828/4664.html?1359360305
一些iOS高效开源类库
http://www.cocoachina.com/iphonedev/toolthain/2011/1227/3791.html?1359360287
iPhone开源项目汇总
http://www.cocoachina.com/iphonedev/toolthain/2011/1109/3480.html?1359360325
50款经典 iPhone 开源应用（附代码下载）
http://www.cocoachina.com/downloads/video/2010/0909/2097.html?1359360401
iPhone开发资源汇总
http://www.cocoachina.com/iphonedev/toolthain/2011/1019/3387.html?1359360429
几个提高 iOS 开发效率的开源类库及工具
http://www.cocoachina.com/iphonedev/sdk/2010/1122/2375.html?1359360885
23个开源App的App Store地址和源代码
http://www.cocoachina.com/iphonedev/sdk/2010/0316/672.html?1359360297
CocoaChina整理的开源iPhone程序不完全列表
http://www.cocoachina.com/iphonedev/toolthain/2009/0611/168.html?1359360474