QuantConnect/Lean

A C# port of shadowsocks

Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The future of .NET UI

FlatBuffers: Memory Efficient Serialization Library

.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!

CodeHub is an iOS application written using Xamarin

Microsoft Cognitive Toolkit (CNTK), an open source deep-learning toolkit

Google's Material Design in XAML & WPF, for C# & VB.Net.

Store securely encrypted backups in the cloud!

EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.

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.

One framework for creating powerful cross-platform games.

QuestPDF is a modern library for PDF document generation. Its fluent C# API lets you design complex layouts with clean, readable code. Create documents using a flexible, component-based approach.