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

Fody add-in that helps with implementing IDisposable.

Add property notification to all classes that implement INotifyPropertyChanging.

Allows a more expressive use of the ObsoleteAttribute.

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.