MonoDevelop is a cross platform IDE mostly aimed at Mono/.NET developers
Mono open source ECMA CLI, C# and .NET implementation.
Tools to manage Mono's releases (scripts, web pages, build files)
Light-weight build/packaging/bundling system for OS X, Linux, and Windows.
Temporary repo to hold nuget binaries for use with MonoDevelop
Packaging metadata for mono-project.com packages
CocosSharp is a C# implementation of the Cocos2D and Cocos3D APIs that runs on any platform where MonoGame runs.
Tools to surface C++ APIs to C#
A cross-platform UI toolkit for creating desktop applications with .NET and Mono
forked from Microsoft/referencesource
Source from the Microsoft .NET Reference Source that represent a subset of the .NET Framework
Continuous build system used by Mono and Moonlight.
One framework for creating powerful cross-platform games.
Bindings to create MacOS X applications with Mono.
Scripts for Jenkins test runner
UPNP binding for Mono/.NET
Packaging metadata for Mono snapshot packages
New TLS implementation for Mono.