Fody 

Extensible tool for weaving .net assemblies.

Add property notification to all classes that implement INotifyPropertyChanged.

Configure async code's ConfigureAwait at a global level.

Fody add-in to decorate arbitrary methods to run code before and after invocation.

Adds a module initializer to an assembly.

Add null checks.

Generate Equals, GetHashCode and operator methods from properties for classes decorated with an [Equals] Attribute.

Adds basic timing to methods.

Helpers for Fody.

Simplifies logging through a static helper class and some IL manipulation.

Fody add-in for changing all members to virtual.

Injects an empty constructor into classes.

Generate ToString method from public properties.

Inject arbitrary IL code at compile time.

NuGet packaging Fody repositories

Allows a more expressive use of the ObsoleteAttribute.

Fody add-in that helps with implementing IDisposable.

Add property notification to all classes that implement INotifyPropertyChanging.

Converts all JetBrains ReSharper code annotations attributes to External Annotations, so you can provide R# annotations to 3rd parties but don't need to deploy JetBrainsAnnotations.dll.

Simplifies logging through a static helper class and some IL manipulation.