Lakario

ASP.NET
ASP.net MVC Awesome - jQuery Ajax Helpers
Chirpy - VS Add In For Handling Js, Css, DotLess, and T4 Files
Code Snippet With Syntaxhighlighter Support for Windows Live Writer
Config Transformation Tool
Configuration Section Designer
DoddleAudit - Audit Trail for LINQ to SQL and EF
Extension Overflow
Irony - .NET Language Implementation Kit.
Json.NET
LINQ to Twitter
Managed Extensibility Framework
MVC ScriptManager
Ninject
patterns & practices Web Client Developer Guidance
PerceptiveMCAPI - A .NET wrapper for the MailChimp Api
StackOverflow.Net
SurveyMaster - web survey form engine
Value Injecter - convention based mapper