如何用Facebook graphic api上传视频：

http://developers.facebook.com/blog/post/532/

Keychain保存数据封装：

https://github.com/carlbrown/PDKeychainBindingsController

对焦功能的实现：

http://www.clingmarks.com/?p=612

自定义圆角Switch按件：

https://github.com/domesticcatsoftware/DCRoundSwitch

弹出窗口For iphone and ipad:

https://github.com/chrismiles/CMPopTipView

KVO详解：

http://nachbaur.com/blog/back-to-basics-using-kvo

图片浏览:

https://github.com/bdewey/Pholio

Dropbox实例：

https://github.com/bdewey/dropvault

当地天气预报实例：

https://github.com/aspitz/WxHere

可伸缩的toolBar实例：

https://github.com/aspitz/ToolDrawer

app资源保护相关：

http://aptogo.co.uk/2010/07/protecting-resources/

cocos2d中也可用UIScrollView,UITableView,UIGestureRecognizers

https://github.com/jerrodputman/CCKit
http://www.tinytimgames.com/2011/08/05/introducing-cckit/

UITableView两级树型结构：

http://www.codeproject.com/KB/iPhone/collapsabletableview.aspx

OS文档导入导出：

http://mobiforge.com/developing/story/importing-exporting-documents-ios

CoreAnimation Demo:

https://github.com/bobmccune/Core-Animation-Demos

CoreAnimation Dev:

Part 1 – Frame By Frame Sprites With Core Animation

Part 2 – Space Time

Part 3 – Scrolling Hell

Part 4 – Parallax Scrolling

iOS jabber聊天应用开发：客户端开发

http://mobile.tutsplus.com/tutorials/iphone/building-a-jabber-client-for-ios-interface-setup/

http://mobile.tutsplus.com/tutorials/iphone/building-a-jabber-client-for-ios-custom-chat-view-and-emoticons/

iOS jabber聊天应用开发：服务器搭建

http://mobile.tutsplus.com/tutorials/iphone/building-a-jabber-client-for-ios-server-setup/

iOS快速入门：

http://www.jonathanhui.com/ios

objc学习：

http://www.jonathanhui.com/objective-c
https://github.com/carlbrown/PDKeychainBindingsController
https://github.com/ldandersen/scifihifi-iphone

KeyChain封装，安全存数据：

http://developer.apple.com/library/mac/#documentation/Security/Conceptual/keychainServConcepts/02concepts/concepts.html
http://developer.apple.com/library/ios/#samplecode/GenericKeychain/Introduction/Intro.html#//apple_ref/doc/uid/DTS40007797-Intro-DontLinkElementID_2

声音相关：

http://purplelilgirl.tumblr.com/post/9377269385/making-that-talking-app
http://dirac.dspdimension.com/Dirac3_Technology_Home_Page/Dirac3_Technology.html

弹珠游戏：

http://www.crowsoft.com.ar/wordpress/?p=19

spring board类UI:

https://github.com/rigoneri/myLauncher

MacOS&iOS upnp:

http://code.google.com/p/upnpx

ios block learn:

http://ios-blog.co.uk/iphone-development-tutorials/programming-with-blocks-an-overview/
https://github.com/zwaldowski/BlocksKit

弹出框中输入用户名与密码：

https://github.com/enormego/EGOTextFieldAlertView

jailbr

搜索itune里app的url scheme:

https://github.com/Zwapp/schemes-scanner

横竖屏切换自动调整位置：

https://github.com/michaeltyson/TPMultiLayoutViewController

键盘出现与消失view自动移动避免遮挡：

https://github.com/michaeltyson/TPKeyboardAvoiding
http://atastypixel.com/blog/a-drop-in-universal-solution-for-moving-text-fields-out-of-the-way-of-the-keyboard/

iOS类似firebug的web调试工具：

http://phonegap.github.com/weinre/

一个UI开源库tapkulibrary，集成了calendar,coverflow

https://github.com/devinross/tapkulibrary

http://maniacdev.com/2010/09/tapku-an-amazing-open-source-ios-interface-library/

多列的TableView

https://github.com/Xenofex/MultiColumnTableViewForiOS

mac的一个桌面程序，开源的

http://homepage.mac.com/nathan_day/pages/popup_dock.xml

eak iphone 发送sms:

http://code.google.com/p/iphone-sms/

PSTreeGraph for iPad

https://github.com/epreston/PSTreeGraph

文件预览like QLPreviewController

https://github.com/rob-brown/RBFilePreviewer

Interface Builder中用自定义字体解决方案

https://github.com/0xced/FontReplacer

有shader的UILabe

https://github.com/nicklockwood/FXLabel

GCD学习

http://blog.slaunchaman.com/2011/02/28/cocoa-touch-tutorial-using-grand-central-dispatch-for-asynchronous-table-view-cells/