jlyonsmith 

An extremely useful collection of utility classes for .NET

TSON: Typeable Simple Object Notation. Fully compatible with JSON, but with relaxed syntax rules that make it much easier for humans to type, plus it supports commenting using #.

Game content creation and compilation tools

Plugins and utility classes for REST API projects using Mono, ServiceStack, MongoDB and RQL

PCL ToolBelt for Applications

REST Query Language (RQL). A simple, extensible query languaged for REST API's.

A simple, low overhead unit test library for Mono. It's is based on the API's from NUnit and MSTest.

RQL binding for MongoDB.

A collection of tools for working with C# and other code