MonoDevelop is a cross platform IDE mostly aimed at Mono/.NET developers
Tools to surface C++ APIs to C#
Mono open source ECMA CLI, C# and .NET implementation.
One framework for creating powerful cross-platform games.
CocosSharp is a C# implementation of the Cocos2D and Cocos3D APIs that runs on any platform where MonoGame runs.
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
Light-weight build/packaging/bundling system for OS X, Linux, and Windows.
Tools to manage Mono's releases (scripts, web pages, build files)
Temporary repo to hold nuget binaries for use with MonoDevelop
Packaging metadata for mono-project.com packages
Continuous build system used by Mono and Moonlight.
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.