开源项目集锦（持续更新）...

1. Coding iOS 客户端

Coding官方客户端. 笔者强烈推荐的值得学习的完整APP.
GitHub - Coding/Coding-iOS: Coding iOS 客户端源代码

2. OSCHINA 的 iPhone 客户端
开源中国的iPhone客户端源码
https://git.oschina.net/oschina/iphone-app

3. Git@OSC

Git@OSC iPhone 客户端，方便用户查看Git@OSC的项目以及简单的操作issue等
oschina / git-osc-iphone

4. Firefox for iOS

GitHub - mozilla/firefox-ios: Firefox for iOS

5. zulip-ios
Dropbox收购公司内部社交服务商Zulip,然后全部开源，这是iOS App
GitHub - zulip/zulip-ios: Zulip iOS app

6. iOSSF
SegmentFault官方App
GitHub - gaosboy/iOSSF: SegmentFault官方App

7. iReddit
Reddit iPhone客户端
GitHub - reddit/iReddit: The iReddit iPhone app

8. Monkey
GitHub第三方iOS客户端
GitHub - coderyi/Monkey: Monkey is a GitHub third party client for iOS,to show the rank of coders and repositories.

9. Watch
Dribbble第三方客户端
GitHub - tuesda/Watch: A project which demonstrate how to develop a custom client on android for dribbble.com

10. Voice2Note
懒人笔记iOS客户端
GitHub - liaojinxing/Voice2Note: 懒人笔记iOS客户端

11. RSSRead
“已阅”（iOS上开源RSS新闻阅读器）
GitHub - ming1016/RSSRead: “已阅”（iOS上开源RSS新闻阅读器），有兴趣？那就Pull Requests吧

12. BeeFancy
BeeFancy仿Fancy官方APP的WIREFRAME，基于BeeFramework
GitHub - BeeFramework/BeeFancy: 仿Fancy官方APP的WIREFRAME，基于BeeFramework

13. SXNews
模仿网易新闻做的精仿网易新闻
GitHub - dsxNiubility/SXNews: High imitation Neteasy News. (include list,detail,photoset,weather,feedback)

14. Doppio
寻找最近的星巴克
GitHub - chroman/Doppio: An open source iOS app to find the nearest Starbucks store using NSURLSession, AFNetworking 2.0, Mantle and Starbucks private API.

15. Anypic
类似于Instagram的一款App
GitHub - ParsePlatform/Anypic: An open source mobile and web app that lets users share photos similar to Instagram

16. 豆瓣相册
Slowslab iOS应用 豆瓣相册 精选集 开源项目
GitHub - TonnyTao/DoubanAlbum: Slowslab iOS应用 豆瓣相册 精选集 开源项目，仅供学习参考

17. ChatSecure-iOS
Objective-C写的XMPP聊天应用
GitHub - ChatSecure/ChatSecure-iOS: ChatSecure is a free and open source encrypted chat client for iPhone and Android that supports OTR encryption over XMPP.

18. NotificationChat
Objective-C写的完整的聊天应用
GitHub - relatedcode/EncryptedChat: This is a full native iPhone app to create realtime, text based group or private chat with Parse and Firebase.

19. FakeZhihuDaily
仿知乎日报iOS客户端
GitHub - gnou/FakeZhihuDaily: 仿知乎日报iOS客户端

20. ruby-china-for-ios
RubyChina官方客户端
GitHub - ruby-china/ruby-china-for-ios: Ruby China client for iOS

21. Meizi
豆瓣妹子图iOS客户端
GitHub - Sunnyyoung/Meizi: 豆瓣妹子图iOS客户端

22. PlainReader
一款 iOS(iPhone + iPad) 新闻类客户端，内容抓取自 http://cnBeta.com
PlainReader/PlainReader at master · guojiubo/PlainReader · GitHub

23. iOS-2048
用Objective-C实现的2048游戏
GitHub - austinzheng/iOS-2048: iOS drop-in library presenting a 2048-style game

24. ECMobile_iOS
基于ECShop的手机商城客户端
GitHub - GeekZooStudio/ECMobile_iOS: 基于ECShop的手机商城客户端

25. wikipedia-ios
维基百科官方App, 已上架
GitHub - wikimedia/wikipedia-ios: The official Wikipedia iOS app.

26. Sol
漂亮的扁平风格的天气App
GitHub - comyarzaheri/Sol: Sol° beautifully displays weather information so you can plan your day accordingly. Check the weather in your current location or any city around the world. Implemented in Objective-C.

27. v2ex
v2ex第三方iOS客户端
v2ex/v2ex-iOS at master · singro/v2ex · GitHub

28. MyOne-iOS
用OC写的《一个》 iOS 客户端
GitHub - meilbn/MyOne-iOS: 我的《一个》 iOS 客户端（OC）

29. WNXHuntForCity
高仿城觅2.0 by-objective-c
GitHub - ZhongTaoTian/WNXHuntForCity: 高仿城觅by-objective-c

30. viewfinder
移动支付公司 Square 将去年收购的照片应用 Viewfinder 开源了，包含服务端、iOS 和 Android 应用代码
GitHub - viewfinderco/viewfinder: Viewfinder client and server code

31. breadwallet
breadwallet iOS bitcoin wallet
GitHub - voisine/breadwallet: breadwallet

32. novel-design
品趣iOS客户端
GitHub - ltebean/novel-design: PinQu ios client

33. WWDC-2014
WWDC客户端
GitHub - indragiek/WWDC-2014: Scholarship submission for WWDC 2014

34. GreatReader
GreatReader PDF阅读客户端
GitHub - semweb/GreatReader: A "great" PDF reader for iOS. Available on the App Store.

35. Tropos
天气客户端
GitHub - thoughtbot/Tropos: Weather and Forecasts for Humans

36. manong-reading
《猿已阅》码农周刊iOS客户端
GitHub - icepy/manong-reading: 《猿已阅》码农周刊iOS客户端

37. YoCelsius
一款天气预报的应用
GitHub - YouXianMing/YoCelsius: 一款天气预报的应用（已在AppStore上线）

38. 密记iOS版
本应用主要功能是简单笔记
GitHub - iHTCboy/SecurityNote: 密记iOS版，第一个开发的完整iOS应用，本应用主要功能是简单笔记。The application of the main function is a simple notes.

39. phphub-ios

PHPHub for iOS is the universal iPhone and iPad application for PHPHub PHPHub - PHP & Laravel的中文社区
GitHub - Aufree/phphub-ios: PHPHub for iOS is the universal iPhone and iPad application for PHPHub

40. Brushes

绘图应用. Painting app for the iPhone and iPad.
GitHub - sprang/Brushes: Painting app for the iPhone and iPad.

41. Inkpad
绘图应用. Inkpad is a vector illustration app designed from scratch for the iPad.
GitHub - sprang/Inkpad: Vector illustration app for the iPad.

42. wh-app-ios

美国白宫（WhiteHouse）的官方app.
GitHub - WhiteHouse/wh-app-ios

43. cheddar-ios
一款日程管理软件.
GitHub - nothingmagical/cheddar-ios: Cheddar for iOS

44. newsyc
Hacker News的iPhone客户端
GitHub - Xuzz/newsyc: An iPhone Hacker News client.

45. WordPress for iOS

WordPress iOS官方客户端. 笔者强烈推荐的开源项目.
GitHub - wordpress-mobile/WordPress-iOS: WordPress for iOS

46. WikiHow
Wikihow–WikiHow的官方app.
GitHub - tderouin/wikiHow-iPhone-Application: The code for the wikihow's iphone app

47. Dollar Bets
记录你和朋友打赌的内容.
GitHub - Rich86man/Dollar-Bets: An iPhone app to keep track of your Dollar Bets

48. Dozuki
iFixit网站的互动修理手册
GitHub - iFixit/iFixit-iOS: iFixit's iOS app for iPad, iPhone, and iPod touch

49. Last.fm
Last.fm 的客户端，国外很火的私人电台.
GitHub - lastfm/lastfm-iphone: The official Last.fm iPhone application

50. ioctocat
GitHub第三方客户端.
GitHub - dennisreimann/ioctocat: iOctocat v1

51. iTunesPicker
类似AppStore的一个应用
GitHub - appcornerit/iTunesPicker: Discover, search and compare world rankings for apps, ibooks, movies, music videos and music from iTunes (and AppStore) in any available country.

52. TeamTalk
蘑菇街TeamTalk. 开源IM. 笔者强烈推荐.
GitHub - mogujie/TeamTalk: TeamTalk is a solution for enterprise IM

53. s-iOS

工具Shadowsocks. Github目前代码已经被移除, 不过2.6.3的还是保留着.

GitHub - s/s-iOS at 2.6.3: Removed according to regulations.

54. MessageDisplayKit
一个类似微信App的IM应用，拥有发送文字、图片、语音、视频、地理位置消息，管理本地通信录、分享朋友 圈、漂流交友、摇一摇和更多有趣的功能。笔者推荐的学习IM的好东西.
GitHub - xhzengAIB/MessageDisplayKit: An IM App like WeChat App has to send text, pictures, audio, video, location messaging, managing local address book, share a circle of friends, drifting friends, shake a fun and more interesting features.

55. NewsBlur
个人新闻阅读器.
NewsBlur/clients/ios at master · samuelclay/NewsBlur · GitHub

56. VLC for iOS
VLC媒体播放器. 官方页面提供源代码下载.
http://www.videolan.org/vlc/download-ios.html

57. Frameless - 全屏Web浏览器
GitHub - stakes/Frameless: A chromeless web browser for viewing prototypes.

58.

iBBS-Swift

一款用Swift写的BBS客户端

SmallDay

用Swift 实现的高仿小日子

Swift-Radio-Pro

Professional Radio Station App, created w/ Swift 2.0

zulip-ios

Dropbox收购公司内部社交服务商Zulip,然后全部开源，这是iOS App

DesignerNewsApp

Build a Swift App as a designer

firefox-ios

Firefox for iOS

iphone-app

开源中国的iPhone客户端源码

Git@OSC

Git@OSC iPhone 客户端，方便用户查看Git@OSC的项目以及简单的操作issue等

Coding

Coding官方客户端 GitHub地址

Coding iPad版

Coding官方客户端

iOSSF

SegmentFault官方App

ioctocat

GitHub第三方客户端

iTunesPicker

类似AppStore的一个应用

Doppio

寻找最近的星巴克

swiftmi-app

http://swiftmi.com app版本 采用Swift实现

Cheddar

一个日程管理的App

BeeFancy

仿Fancy官方APP的WIREFRAME，基于BeeFramework

Anypic

类似于Instagram的一款App

SXNews

模仿网易新闻做的精仿网易新闻

iReddit

Reddit iPhone客户端

readdit

Reddit iPad客户端

豆瓣相册

Slowslab iOS应用 豆瓣相册 精选集 开源项目

ChatSecure-iOS

Objective-C写的XMPP聊天应用

NotificationChat

Objective-C写的完整的聊天应用

Swift-ZhihuDaily

用Swift实现的仿知乎日报应用

FakeZhihuDaily

仿知乎日报iOS客户端

edhita

用Swift实现的iOS平台开源文本编辑器。

ruby-china-for-ios

RubyChina官方客户端

Meizi

豆瓣妹子图iOS客户端

HackerNews

用Swift写的Hacker News 阅读 iOS App

SwiftHN

另外一个用Swift写的Hacker News 阅读App

News-YC

Hacker News阅读类iOS App

twidere

twitter 第三方客户端

2048

用SpriteKit实现的2048游戏

PlainReader

一款 iOS(iPhone + iPad) 新闻类客户端，内容抓取自 http://cnBeta.com

swift-2048

用Swift实现的2048游戏

iOS-2048

用Objective-C实现的2048游戏

FlappySwift

用swift实现的flappy bird游戏

ECMobile_iOS

基于ECShop的手机商城客户端

kxmovie

用ffmpeg写的iOS视频播放器

wikipedia-ios

维基百科官方App, 已上架

Sol

漂亮的扁平风格的天气App

Project-RainMan

用Swift写的天气类App

SwiftWeather

用Swift写的天气类App

v2ex

v2ex第三方iOS客户端

V2EXClient

Swift实现的V2EX iOS客户端

VPNOn

VPN连接管理,支持Apple Watch,已上架

Monkey

GitHub第三方iOS客户端

JokeClient-Swift

基于swift,用糗事百科的API简单做了一个糗百客户端,可以浏览各种段子,浏览搞笑图片,查看精彩评论等.

Watch

Dribbble第三方客户端

MyOne-iOS

用OC写的《一个》 iOS 客户端

BaiduFM-Swift

百度FM swift语言实现

WNXHuntForCity

高仿城觅2.0 by-objective-c

Tomate

圆盘式计时器

eigen

The Art World in Your Pocket or Your Trendy Tech Company's Tote, Artsy's iOS app.

WWDC

WWDC app for OS X

Voice2Note

懒人笔记iOS客户端

viewfinder

移动支付公司 Square 将去年收购的照片应用 Viewfinder 开源了，包含服务端、iOS 和 Android 应用代码

RSSRead

“已阅”（iOS上开源RSS新闻阅读器）

breadwallet

breadwallet iOS bitcoin wallet

novel-design

品趣iOS客户端

Brushes

iPhone和iPad上的画图软件

Concurrency

货币换算软件

WhoCall

谁CALL我 - iOS来电信息语音提醒

Mogo-iOS

Mogo群聊客户端

WWDC-2014

WWDC客户端

the-oakland-post

Swift写的Oakland客户端

GreatReader

GreatReader PDF阅读客户端

Tropos

天气客户端

manong-reading

《猿已阅》码农周刊iOS客户端

https://github.com/vsouza/awesome-ios#calendar

https://github.com/dkhamsing/open-source-ios-apps/blob/master/README.md