MonoDevelop is a cross platform IDE mostly aimed at Mono/.NET developers
Mono open source ECMA CLI, C# and .NET implementation.
Packaging metadata for mono-project.com packages
One framework for creating powerful cross-platform games.
Support for the Skia Library
Build & packaging system, responsible for the Mono project distribution for Mac
Tools and libraries to glue C/C++ APIs to high-level languages
A cross-platform UI toolkit for creating desktop applications with .NET and Mono
Gtk# is a Mono/.NET binding to the cross platform Gtk+ GUI toolkit and the foundation of most GUI apps built with Mono
Mono.Addins is a generic framework for creating extensible applications, and for creating add-ins which extend those applications.
Open source .NET binding for the Vulkan API
CocosSharp is a C# implementation of the Cocos2D and Cocos3D APIs that runs on any platform where MonoGame runs.
Skia is a complete 2D graphic library for drawing Text, Geometries, and Images.
Custom version of Boring SSL used by Mono
Docker images, for the Docker container system
Packaging metadata for Mono snapshot packages
Visual Basic Compiler and Runtime