Entity Framework Repository Unit of Work Pattern

List of .NET Dependency Injection Containers (IOC)

Castle Windsor based on the Castle MicroKernel.

Licensed under Apache 2

Currently 1.0 RC3

Well documented and used by many.

StructureMap has been around since June 2004

Licensed under Apache 2

Actively developed and approaching v2.5.

Written by Jeremy D. Miller

Spring.NET

Licensed under Apache 2

Currently 1.1, working on 2.0

Written by Mark Pollack

Autofac intends to be IoC with a C# 3.0 flavor, but also supports 2.0.

Licensed under MIT

Written by Nicholas Blumhardt and Rinat Abdullin

Unity

Licensed as MS-PL

Recently released

Written by Chris Tavares.

Build on the "kernel" of ObjectBuilder:

ObjectBuilder was formerly MSFT's only public foray into DI/IoC

Custom PnP License, more restrictive than MS-PL

Part of the MS PnP group

Written by Brad Wilson, Peter Provost and Scott Densmore

Puzzle.NFactory 

Licensed under the Lesser GPL

Part of the larger Puzzle Framework

Written by Roger Alsing and Mats Helander

Ninject formerly "Titan"

Licensed under Apache 2

Was quiet, but has recently sprung back to life.

Written by Nate Kohari

S2Container.NET on version 1.3.7.

Port of Java's Seasar2

PicoContainer.NET

Port of Java's PicoContainer

Written by Aslak Hellesøy

LinFu 

Licensed under Lesser GPL

Written by Philip Laureano

Hacked DIY (Do It Yourself)

There are many examples of quicky IOC Containers. Interesting for learning but little else.

Oren Eini's IOC in 15 lines and a follow up in Ken Egozi's IOC in 15 lines