Static reflection for enums (to string, from string, iteration)
Confluent's Apache Kafka .NET client
Entity Framework Core provider for PostgreSQL
Command-line shell and scripting language built on .NET
Unity / XNA game patcher and plugin framework
Browser automation framework and ecosystem
Scripting platform, modding framework and VR support for RE Engine
mpv.net is a modern media player for Windows that works just like mpv
Win32 port of OpenSSH
A Fast and Easy to use microframework for the web
BizHawk is a multi-system emulator written in C#
Cross-platform runtime for cloud, mobile, desktop, and IoT apps
JUCE is an open-source cross-platform C++ application framework
Espressif IoT Development Framework
Capstone disassembly/disassembler framework
UNIX-like reverse engineering framework and command-line toolset
Multi-Platform Package Manager for Stable Diffusion
.NET bindings for the Chromium embedded framework
Google Testing and Mocking Framework
Core functionality needed to create .NET Core projects
Open source obfuscation tool for .NET assemblies
Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc
A framework to build Pokémon RPG games
Git + .NET/Mono
MAME is a multi-purpose emulation framework