mono topic
reactor-core
Non-Blocking Reactive Foundation for the JVM
ILSpy
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
ldap4net
OpenLdap port for DotNet Core (Linux\OSX\Windows)
BepInEx
Unity / XNA game patcher and plugin framework
MonoMod
C# modding swiss army knife, powered by cecil.
uno
Build Mobile, Desktop and WebAssembly apps with C# and XAML. Today. Open source and professionally supported.
MelonLoader
The World's First Universal Mod Loader for Unity Games compatible with both Il2Cpp and Mono
Harmony
A library for patching, replacing and decorating .NET and Mono methods during runtime
Quasar
Remote Administration Tool for Windows
SteamKit
SteamKit2 is a .NET library designed to interoperate with Valve's Steam network. It aims to provide a simple, yet extensible, interface to perform various actions on the network.