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.

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