1.AFNetworking https://github.com/AFNetworking/AFNetworking
2.GPUImage https://github.com/BradLarson/GPUImage
3.Masonry https://github.com/SnapKit/Masonry
4.lottie-ios https://github.com/airbnb/lottie-ios
5.realm-cocoa https://github.com/realm/realm-cocoa
6.YYKit https://github.com/ibireme/YYKit
7.JSQMessagesViewController https://github.com/jessesquires/JSQMessagesViewController （This library is deprecated. Please read my blog post for details.）
8.SVProgressHUD https://github.com/SVProgressHUD/SVProgressHUD
9.WebViewJavascriptBridge https://github.com/marcuswestin/WebViewJavascriptBridge
10.iCarousel https://github.com/nicklockwood/iCarousel
11.JSPatch （ JSPatch is generally used to hotfix iOS App.）
12.CocoaLumberjack （A fast & simple, yet powerful & flexible logging framework for Mac and iOS）
13.RestKit （RestKit is a framework for consuming and modeling RESTful web resources on iOS and OS X）
14.CocoaAsyncSocket （Asynchronous socket networking library for Mac and iOS）
15.PNChart （A simple and beautiful chart lib used in Piner and CoinsMan for iOS）
16.FLEX （An in-app debugging and exploration tool for iOS）
17.Shimmer （An easy way to add a simple, shimmering effect to any view in an iOS app.）
18.IGListKit （A data-driven UICollectionView framework for building fast and flexible lists. ）
19.MWPhotoBrowser （A simple iOS photo and video browser with grid view, captions and selections.）
20.FastImageCache （iOS library for quickly displaying images while scrolling）
