martindevans 

XNA Rendering Pipeline

A Framework for XNA games

Entity/Scene management framework

A .Net Port of OpenSteer

Content pipeline extensions for Myre.Graphics

A Debugging Framework for XNA games

C# Wrapper For FMOD Studio

Cassowary.net core library

Cassowary.net parsing support library

A basic framework for in game UIs

In game graphical display of debugging tools

Game State Management

A set of handy collections

A library for topologically sorting things by specifying dependencies between them

Performs binary searches (not necessarily on arrays)

Generates gendered names in specific locales

Link Format Parser

A 2D constrained Delaunay triangulation library

C# Wrapper For FMOD Studio (With Native Dependencies)