The post basically looks over some projects listed in awesome ios. I do not dive deep into each project to figure out what it does with method swizzling technique. Some of them use method swizzling for writing unit tests, some use swizzling for its core logic business, etc.
Firebase Firebase is Google’s mobile platform that helps you quickly develop high-quality apps and grow your business.
Realm-Cocoa The alternative to CoreData and SQLite: Simple, modern and fast.
Reskit RestKit is an Objective-C framework for iOS that aims to make interacting with RESTful web services simple, fast and fun.
AFNetworking A delightful iOS and macOS networking framework.
road-ios-framework Attributed-oriented approach for interacting with web services. The framework has built-in JSON and XML serialization for requests and responses and can be easily extensible.
Debugging toolkits & frameworks
PonyDebugger Remote network and data debugging for your native iOS app using Chrome Developer Tools.
Netfox A lightweight, one line setup, iOS / macOS network debugging library!
DBDebugToolkit Remote network and data debugging for your native iOS app using Chrome Developer Tools.
God eye Automatically display Log, Crash, Network, ANR, Leak, CPU, RAM, FPS, NetFlow, Folder and etc with one line of code based on Swift.
Network eye an iOS network debug library, It can monitor HTTP requests within the App and displays information related to the request.
Flex Next generation debugging framework for iOS.
Alpha Next generation debugging framework for iOS.
Droar Droar is a modular, single-line installation debugging window
Hyperion In-app design review tool to inspect measurements, attributes, and animations.
Dotzu iOS app debugger while using the app. Crash report, logs, network.
Wromholy iOS network debugging, like a wizard
OCMock Mocking framework for unit testing
Bolts-Objc Bolts is a collection of low-level libraries designed to make developing mobile apps easier, including tasks (promises) and app links (deep links).
There are more projects in the real world, temporarily this is what I find so far.
(I will keep updating later)