A framework is a reusable set of libraries or classes in software. In an effort to help developers focus their work on higher level tasks, a framework provides a functional solution for lower level elements of coding. While a framework might add more code than is necessary, they also provide a reusable pattern to speed up development.
ASP.NET Boilerplate - Web Application Framework
Open-source web application framework for ASP.NET Core! Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET. Provides the fundamental infrastructure, cross-cutting-concern implementations, startup templates, application modules, UI themes, tooling and documentation.
Machine learning, computer vision, statistics and general scientific computing for .NET
Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
Util是一个.Net平台下的应用框架，旨在提升中小团队的开发能力，由工具类、分层架构基类、Ui组件，配套代码生成模板，权限等组成。
An advanced, composable, functional reactive model-view-viewmodel framework for all .NET platforms that is inspired by functional reactive programming. ReactiveUI allows you to abstract mutable state away from your user interfaces, express the idea around a feature in one readable place and improve the testability of your application.
Unity / XNA game patcher and plugin framework
Oqtane is an open-source developer productivity platform for building modern .NET applications that run on Web, Desktop and Mobile.
一个基于Entity-Component模式的灵活、通用、可扩展的轻量战斗（技能）框架，配置可选使用ScriptableObject或是Excel表格. A flexible, generic, easy to extend, lightweight combat (skills) framework based on Entity-Component pattern. Configuration can choose to use ScriptableObject or Excel tables.
Async/await first CQRS+ES and DDD framework for .NET
Unity框架解决方案-支持HybridCLR(最好的次时代热更)、Obfuz混淆代码加固与YooAssets(优秀商业级资源框架)。
UI automation library for .Net
Dependency Injection Framework for Unity3D
The solution that allows unity games to update in runtime. 使Unity开发的游戏支持热更新的解决方案。
ReaLTaiizor is a .NET WinForms control library that offers a wide range of components and is user-friendly and design-focused.