I have written a small abstraction layer on IoC containers and plugins for containers that work with Xamarin. They are available on NuGet:
https://www.nuget.org/packages?q=xlabs.ioc
Tested containers (unit tests are in GitHub):
- Autofac
- Ninject
- SimpleInjector
- TinyIOC
- Unity
Matt Whetton has written an excellent guide on how to use them.