Scan WiFi information:
Http://code.google.com/p/uwecaugmentedrealityproject/
Http://code.google.com/p/iphone-wireless/
Barcode scanning:
Http://zbar.sourceforge.net/iphone/sdkdoc/install.html
TCP/IP communication protocol:
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 panoramic display 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 encoding and decoding:Http://code.google.com/p/json-framework
Base64 encoding and decoding:Http://code.google.com/p/google-toolbox-for-mac/source/browse/trunk/Foundation? R = 87
XML parsing:Https://github.com/schwa/TouchXML
Securely Save the user password to the keychain:Https://github.com/ldandersen/scifihifi-iphone
Loading the wait special effect framework (Private API ):Https://github.com/jdg/MBProgressHUD
Encapsulation of HTTP and other related protocols:Http://allseeing-i.com/ASIHTTPRequest
Pull-down refreshCode:Https://github.com/enormego/EGOTableViewPullRefresh
Asynchronously load the image and cache the Code:Http://www.markj.net/iphone-asynchronous-table-image/
IPhone tts:Https://bitbucket.org/sfoster/iphone-tts
IPhone cook book source code:Https://github.com/erica/iphone-3.0-cookbook-
IPhone regular expression:Http://regexkit.sourceforge.net/RegexKitLite/
oauth: http://code.google.com/p/oauth/
http://code.google.com/p/oauthconsumer/